💥UPSC 2027,2028 Mentorship (April Batch) + Access XFactor Notes & Microthemes PDF
Talk to mentor

Civilsdaily

Login

Type: Prelims Only

  • Festivals, Dances, Theatre, Literature, Art in News

    Festivals in news: Pulikkali

    Prelims Only | History | Mains Paper 1: Arts & Culture

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Pulikkali Celebrations, Onam

    Mains level: Not Much

    pulikkali

    Central Idea

    • The culmination of Onam festivities witnessed the Pulikkali celebration, a traditional folk art form from Kerala, where humans dressed as tigers and leopards paraded through the streets.

    About Pulikkali

    • Pulikkali, also known as Tiger Dance, is a unique folk art of Kerala.
    • Celebrated on the fourth day of Onam, artists adorn themselves as tigers with distinctive yellow, red, and black stripes, accompanied by the rhythmic beats of traditional percussion instruments like thakil, udukku, and chenda.
    • The central theme revolves around tiger hunting, with individuals playing the roles of both the tiger and the hunter.
    • It was introduced by Maharaja Rama Varma Sakthan Thampuran, the former ruler of Cochin, Pulikkali reflects a rich cultural heritage.

    Onam Festival: Key Highlights

    • Onam, the most significant celebration in Kerala, holds great cultural importance.
    • Occurring at the onset of Chingam, the first month of the Malayalam Calendar, it’s a harvest festival celebrating prosperity.
    • The Onam Carnival extends for four to ten days, with Atham (first day) and Thiruonam (tenth day) as the most pivotal.
    • A popular belief holds that Onam welcomes King Mahabali’s spirit, who is believed to visit Kerala during this period.
    • The festival includes Vallamkali, a thrilling snake boat race ‘Vallamkali’ conducted on the Pampa River.
    • Onam showcases Kaikotti kali and Thumbi Thullal, graceful dances performed by women, adding elegance to the celebrations.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • ISRO Missions and Discoveries

    Chandrayaan-3 Update: Pragyan put to Sleep Mode

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Chandrayan-3

    Mains level: Not Much

    Central Idea

    • Chandrayaan-3 accomplished India’s historic achievement of soft landing on the Lunar South Pole.
    • Its mission success marked by several noteworthy observations since touchdown on August 23.

    Chandrayaan-3’s: Key Achievements

    • Pragyan rover’s Laser-Induced Breakdown Spectroscopy (LIBS) instrument identified elements like aluminium, sulphur, calcium, iron, and more.
    • Vikram lander recorded a ‘moonquake’ and detected an ultra-thin layer of plasma in the lunar atmosphere.
    • These findings hint at distinct characteristics of the moon’s atmosphere compared to Earth.

    Significance of Observations

    • Sulphur discovery carries paramount importance in comprehending the moon’s origin and past surface (explosiveness) conditions.
    • The presence of significant sulphur amounts can provide insights into lunar volcanic activity, potentially indicating the presence of subterranean water.
    • Sulphur’s presence could offer clues about past lunar life support and constructing structures for human habitation.

    Exploring Lunar Water

    • Chandrayaan-3’s findings, particularly sulphur and oxygen on the moon’s surface, play a crucial role in narrowing down possible water sources.
    • The presence of sulphur and oxygen enhances the prospects of water detection.
    • ISRO was actively pursuing information about lunar hydrogen, another potential indicator of water.

    Other mission Lunar Discoveries

    • China’s Chang’e 5 mission unveiled a new lunar mineral, Changesite-(Y), and identified water in glass beads.
    • Chandrayaan-3’s sulphur detection aligns with the quest for similar glass beads.
    • NASA previously confirmed lunar water presence in shadowed craters and sunlit regions.

    Present status of Ch-3 Mission

    • Chandrayaan-3’s core objectives attained; Pragyan rover placed in ‘sleep’ mode.
    • The rover’s solar panels will recharge during the next lunar sunrise.
    • Plans to reactivate the rover for further observations remain underway.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • ISRO Missions and Discoveries

    Unveiling the Sun’s Secrets: ISRO’s Aditya-L1 Mission

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Adiitya L1 Mission

    Mains level: Not Much

     

    aditya

    Central Idea

    • India’s maiden solar observatory mission, Aditya-L1, was successfully launched by ISRO on September 2.
    • Carried by the PSLV in its 59th flight, the spacecraft’s mission aims to study the sun’s behaviour and phenomena.
    • Aditya-L1 will spend 16 days orbiting Earth, undergoing five manoeuvres for required velocity.
    • Subsequent Trans-Lagrangian insertion will begin a 110-day journey towards L1 Lagrange point.
    • Aditya-L1 will orbit around L1, a balanced position between Earth and the sun, 1.5 million km away from Earth.

    Aditya-L1 Mission

    aditya

    • ISRO introduces the Aditya-L1 mission, a novel space-based observatory designated for studying the Sun.
    • The spacecraft will be positioned in a halo orbit around the Lagrange point 1 (L1) in the Sun-Earth system, approximately 1.5 million km from Earth.
    • The L1 point’s strategic location enables continuous solar observation devoid of eclipses, furnishing invaluable insights into solar activities and their real-time effects on space weather.
    • Once Aditya exits Earth’s sphere of influence, it will head towards the Lagrange point L1, a distance of 1.5 million km.

    Significance of Lagrange Point 1

    • Lagrange points are equilibrium positions where gravitational forces counteract centripetal forces, offering a stable environment for satellites.
    • The spacecraft will be positioned around L1, affording an unobstructed view of the Sun for unhindered observation.
    • Different Lagrange points offer unique advantages, such as L1’s consistent view of the Sun, as demonstrated by the Solar and Heliospheric Observatory Satellite (SOHO).

    Aditya-L1’s Scientific Endeavors

    • Aditya-L1 carries seven payloads to investigate the photosphere, chromosphere, and corona using a range of detectors.
    • The payloads encompass instruments like Visible Emission Line Coronagraph (VELC), Solar Ultraviolet Imaging Telescope (SUIT), Solar Low Energy X-ray Spectrometer (SoLEXS), and more.
    • Payloads examining solar dynamics in the interplanetary medium contribute to a better understanding of phenomena like coronal heating, mass ejections, and space weather.

    Significance of Solar Study

    • Solar Influence on the System: The Sun significantly shapes planetary evolution and weather, extending its impact to satellites, electronics, power systems, and even Earth’s climate.
    • Predicting Solar Storms: Continuous solar observations are essential for tracking Earth-bound solar storms and predicting their potential impacts.
    • Gateway through L1: All solar storms heading towards Earth pass through L1, making it a crucial point for monitoring.

    Key Feature: Mighty LAM Engine

    • The Liquid Apogee Motor (LAM) engine, developed by ISRO’s Liquid Propulsion Systems Centre (LPSC), is vital to the Aditya-L1 mission’s success.
    • LAM has played pivotal roles in missions like Mars Orbiter Mission (Mangalyaan) and Chandrayaan-3.
    • LAM engines facilitate satellite and spacecraft orbital adjustments, conserving fuel and ensuring optimal positioning.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • Child Rights – POSCO, Child Labour Laws, NAPC, etc.

    In news: Mitakshara Law of Succession

    Prelims Only | History | Mains Paper 1: Arts & Culture

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Mitakshara School of Law

    Mains level: Not Much

    Central Idea

    • The Supreme Court clarified that children born from void or voidable marriages can inherit the parent’s share in a joint Hindu family property governed by Mitakshara law.
    • However, the inheritance rights are limited to the parent’s share and do not extend to other family members’ properties.

    Mitakshara School of Law

    History Originated in ancient India; attributed to Vijnaneshvara, a 12th-century scholar
    Focus Interpretation of Yajnavalkya Smriti in matters of family, property, and inheritance law
    Ancestral Property Emphasis on joint family property and ancestral property rights
    Inheritance Defines rules for succession and inheritance within Hindu families
    Variations Different regional interpretations, including the “Dayabhaga” School
    Regional Influence Widespread influence on Hindu legal practices, especially in property law
    Development Evolved over time and influenced by legal reforms and societal changes
    Modern Context Coexists with contemporary legal frameworks and personal laws
    Significance Played a significant role in shaping Hindu family and property law

    Nature of Marriages and Law

    • A voidable marriage is made invalid by the husband or wife through a decree.
    • A void marriage is invalid from the beginning.
    • Mitakshara Law of Succession applies to Hindu Undivided Families across India, except West Bengal and Assam.

    Ruling Details

    • The Supreme Court, headed by Chief Justice D.Y. Chandrachud, clarified that the child from a void or voidable marriage cannot claim rights to other family members’ properties.
    • The child’s inheritance rights pertain only to the parent’s share in the ancestral property.
    • A “notional partition” is conducted to ascertain the parent’s share immediately before their death.

    Inheritance Calculation

    • The law assumes a partition of the ancestral property between the deceased parent and other family members before the parent’s death.
    • The child’s inheritance is based on the share the parent would have received through this notional partition.

    Legal Basis

    • Section 16 of the Hindu Marriage Act grants legitimacy to children born from void or voidable marriages.
    • The court held that these children have the right to their parents’ property.
    • The intent of granting legitimacy to such children in the Hindu Marriage Act is reflected in the Hindu Succession Act.

    Impact of Amendment

    • The Hindu Succession (Amendment) Act, 2005, allows a deceased person’s share in a joint Hindu family property to devolve to heirs by testamentary or intestate succession.
    • Before the amendment, devolution occurred only through survivorship.
    • Equal rights of succession are now granted to women as well as men.

    Background and Precedents

    • The case was centered on Section 16(3) of the Hindu Marriage Act.
    • In 2011, a Division Bench of the Supreme Court championed the rights of children born from illegitimate marriages to inherit their parents’ properties.
    • The Division Bench emphasized that these children deserve the same rights as those born from valid marriages.

    Conclusion

    • The concept of legitimacy evolves with changing social norms.
    • The court observed that what was considered illegitimate in the past may be legitimate today.
    • Children born from void or voidable marriages should not be denied inheritance rights based on evolving social consensus.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • Foreign Policy Watch: India-China

    Tibetan Democracy Day: A Legacy of Struggle and Resilience

    Prelims Only | International Relations | Mains Paper 2: Bilateral, Regional and Global Groupings and agreements involving India

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Tibetan Democracy Day

    Mains level: Not Much

    tibet

    Central Idea

    • Tibetan Democracy Day on September 2 marks the founding of the Tibetan government-in-exile in Dharamshala.
    • It signifies the establishment of Tibetan democracy after forced displacement.

    Tibetan Govt in Exile: Historical Genesis

    • In 1960, a year after Tibetans were displaced, the first elected representatives of the Tibetan Parliament-in-exile were sworn in.
    • His Holiness the 14th Dalai Lama’s influence led to the enactment of the Tibetan constitution in 1963, emphasizing democracy.

    Role of Central Tibetan Administration (CTA)

    • The CTA, based in Dharamshala, manages over 100,000 Tibetan refugees globally.
    • It is the heart of Tibetan self-governance and resilience.
    • CTA’s Evolution:
    1. The first women representatives were elected in 1963 under the Tibetan constitution.
    2. In 1975, the CTA declared September 2 as the founding day of Tibetan democracy.
    3. The Charter of the Tibetans in exile was adopted in 1991, followed by the Tibetan Supreme Justice Commission in 1992.

    CTA’s Functioning

    • The CTA, led by the President (Sikyong), operates through departments: Religion and Culture, Home, Finance, Education, Security, Information and International Relations, and Health.
    • The Tibetan Parliament-in-exile has 45 members representing various aspects of the Tibetan community.

    Leadership Transition

    • The Dalai Lama’s shift to semi-retirement led to direct elections of the executive head, Kalön Tripa.
    • In 2011, His Holiness delegated political authority to Sikyong, the President of the CTA.

    Bodh Gaya’s Role

    • In 1960, the first elected Tibetan representatives took their oaths in Bodh Gaya, marking the inception of the democratic system.
    • Bodh Gaya played a pivotal role in the early days of Tibetan democracy.

    India’s perception of Tibet

    • India respects the Dalai Lama as a spiritual leader but does not officially recognize the CTA as a government.
    • It balances diplomatic considerations while supporting Tibetan refugees.

    Global Recognition

    • The US stands as a vocal supporter, with bipartisan backing and specialized coordinators for Tibet.
    • While global recognition is limited, Tibetans value India’s consistent support.

    Back2Basics: Tibetan Buddhism

    Description
    Origin and Development Form of Vajrayana Buddhism; emerged in Tibetan Plateau and Himalayan regions
    Tantric Practices Emphasizes rapid spiritual awakening through rituals, visualizations, and energy transformation
    Dalai Lama and Panchen Lama Dalai Lama (Tenzin Gyatso) is spiritual leader; Panchen Lama is also significant
    Monastic Traditions Strong monastic presence; monks and nuns preserve teachings and meditate
    Deity Pantheon Diverse deities representing enlightenment qualities; depicted in mandalas and thangkas
    Prayer Flags and Wheels Flags convey prayers; wheels accumulate merit and blessings
    Reincarnation and Tulku System Belief in reincarnation; system to identify tulkus (reincarnated lamas)

     

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • The Crisis In The Middle East

    Armenia and Azerbaijan Conflict

    Prelims Only | International Relations | Mains Paper 2: India & Its Neighborhood – Relations

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Nagorno-Karabakh region

    Mains level: Usual crisis in the middle east and caucasus region

    Central Idea

    • Three Armenian soldiers have been killed in firing from Azerbaijan as tensions between the two countries persist.

    Consider this PYQ:

    Q.The area is known as ‘Golan Heights’ sometimes appears in the news in the context of the events related to: (CSP 2015)

    a) Central Asia
    b) Middle East
    c) South-East Asia
    d) Central Africa

    Post your answers here.

    What is the dispute?

    • Armenia and Nagorno-Karabakh, a breakaway region that is inside Azerbaijan but is run by ethnic Armenians, declared martial law and mobilized their male populations.
    • Armenia said Azerbaijan had carried out an air and artillery attack on Nagorno-Karabakh.

    Epicentre: The Nagorno-Karabakh region

    • Nagorno-Karabakh broke away from Azerbaijan in a conflict that broke out as the Soviet Union collapsed in 1991.
    • A ceasefire was agreed in 1994 after thousands of people were killed and many more displaced.
    • Azerbaijan and Armenia frequently accuse each other of attacks around Nagorno-Karabakh and along the separate Azeri-Armenian frontier.

    Economics behind the clashes

    • The clashes prompted a flurry of diplomacy to prevent a new flare-up of a decades-old conflict between majority Christian Armenia and mainly Muslim Azerbaijan.
    • Pipelines shipping Caspian oil and natural gas from Azerbaijan to the world pass close to Nagorno-Karabakh.
    • The clashes have raised concerns about instability in the South Caucasus, a corridor for pipelines transporting oil and gas to world markets.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • Nobel and other Prizes

    2023 Ramon Magsaysay Award to Indian Oncologist

    Prelims Only | History | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Ramon Magsaysay Award

    Mains level: Not Much

    Ramon Magsaysay

    Central Idea

    • Dr. R. Ravi Kannan, a surgical oncologist and Director of Cachar Cancer Hospital and Research Centre (CCHRC) in Assam, has been named one of the 2023 Ramon Magsaysay Awardees.
    • His pioneering efforts have revolutionized cancer treatment in Assam by prioritizing people-centric and pro-poor healthcare solutions.

    Dr. Kannan’s Inspiring Work

    • Under Dr. Kannan’s guidance, CCHRC evolved from having limited facilities to encompassing 28 departments, including oncology, pathology, radiology, microbiology, epidemiology, and palliative care.
    • The hospital introduced pro-poor measures such as free treatment, lodging, meals, ad hoc employment for caregivers, and a homecare program to address patients’ challenges in continuing treatment due to poverty and distance.
    • The hospital team extended their support by providing training to family members in pain management and palliative care, and distributing free medicines.
    • As a result, the compliance rate for cancer treatment increased remarkably, from 28% to 70%.

    About Ramon Magsaysay Award

    • The Ramon Magsaysay Award, established in 1958, stands as a significant accolade, often referred to as Asia’s equivalent of the Nobel Prize.
    • This prestigious award honors individuals and organizations in Asia for their exceptional contributions to society across various domains.

    Who was Ramon Magsaysay?

    • Ramon Magsaysay was the Philippines’ president from 1953 until his tragic death in a plane crash in 1957.
    • He gained prominence during World War II when Japanese forces occupied the Philippines, then a US colony.
    • In December 1953, he was elected president from the Nationalist Party, the country’s oldest political party.
    • Post-war chaos gripped the Philippines in 1946, accompanied by a widening gap between the rich and poor, exacerbated by the expansion of capitalism.
    • Amidst suspicions of communist affiliations and demands for peasant rights, leaders were targeted by the government, aligned with the USA.
    • Magsaysay’s administrative and military strategies played a pivotal role in countering the perceived threat of communism.

    Indian Awardees: A Legacy of Excellence

    Eminent Indians have been recognized through the Ramon Magsaysay Award:

    1. Vinoba Bhave (1958)
    2. Mother Teresa (1962)
    3. Kamaladevi Chattopadhyay (1966)
    4. Satyajit Ray (1967)
    5. Mahasweta Devi (1997)
    6. Arvind Kejriwal (2006)
    7. Anshu Gupta of Goonj (2015)
    8. Bezwada Wilson, human rights activist (2016)
    9. Ravish Kumar, journalist (2019)

    Significance of the Award

    • The Ramon Magsaysay Award symbolizes a deep commitment to altruism and service, acknowledging outstanding contributions that make a positive impact on society.
    • It is a reminder that individuals and organizations can effect transformative change through their selfless efforts.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • Telecom and Postal Sector – Spectrum Allocation, Call Drops, Predatory Pricing, etc

    Sanchar Saathi: Empowering Citizens

    Prelims Only | Economics | Mains Paper 2: Governance, Transparency & Accountability, Citizens Charters

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Sanchar Saathi

    Mains level: Not Much

    Central Idea

    • Recent reforms in the Indian telecom sector target cybercrime and financial fraud prevention.
    • The reforms focus on revising bulk SIM card procurement norms and registering final points of sale (PoS).
    • The objective is to bolster the effectiveness of the citizen-centric portal Sanchar Saathi, initiated earlier for the same purpose.

    Sanchar Saathi: Empowering Citizens

    • Sanchar Saathi empowers citizens to manage mobile connections and prevent misuse.
    • Users can verify their registered connections, block stolen or lost phones, report suspicious connections, and verify device authenticity using IMEI.
    • The system employs Central Equipment Identity Register (CEIR) and Telecom Analytics for Fraud Management and Consumer Protection (TAFCOP) modules.
    • Sanchar Saathi has already analyzed 114 crore active mobile connections, identified 66 lakh suspicious connections, and disconnected 52 lakh connections.
    • Additional achievements include blocking 66,000 WhatsApp accounts and freezing 8 lakh bank/wallet accounts linked to fraud.
    • Over 300 FIRs have been filed against more than 1,700 dealers under the initiative.

    Point of Sale (PoS) Reforms

    • Reforms mandate registration of SIM card franchisees, agents, and distributors (PoS) with telecom operators.
    • Operators are accountable for robust PoS verification, including mandatory police verification.
    • Written agreements between PoS and licensees for SIM card sales are now obligatory.
    • Existing SIM card providers are given a year to comply with the new registration process.
    • Non-compliance results in termination, a 3-year blacklist, and a Rs 10 lakh penalty.

    Addressing Bulk SIM Card Misuse

    • The new approach replaces ‘bulk procurement’ with ‘business’ connections.
    • Businesses can procure numerous connections, but each end-user must undergo KYC.
    • KYC involves end-user verification, activating the SIM card only after successful KYC and address verification.
    • To prevent misuse of printed Aadhaar, demographic details must be captured by scanning the QR code.
    • Subscribers require full KYC for SIM replacement; outgoing and incoming SMS services are suspended for 24 hours during this process.
    • Biometric authentication options, including thumb impression, iris, and facial recognition, are introduced.
    • Disconnected mobile numbers cannot be assigned to other customers for 90 days.

    Challenges and Considerations

    • Effective enforcement at the local level for smaller stores needs examination.
    • Concerns arise regarding infrastructure and safeguards for handling sensitive data.
    • Clarity on agent requirements for data acquisition, processing, and retention is necessary.
    • Despite Aadhaar-based KYC, persisting issues in fraud prevention need attention.
    • Data acquisition should strictly align with its intended purpose.

    Conclusion

    • The telecom reforms aim to strengthen cybersecurity and financial safety.
    • Balancing effective data collection and privacy is essential.
    • Continuous vigilance and adaptation are vital to a robust cybersecurity framework.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • GI(Geographical Indicator) Tags

    Magic Rice ‘Chokuwa Saul’ gets GI Tag

    Prelims Only | Agriculture | Mains Paper 3: Intellectual Property Rights

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Chokuwa Saul Rice, GI Tag

    Mains level: NA

    chokuwa

    Central Idea

    • Chokuwa rice, the unique possession of Assam’s Ahom dynasty, recently earned a GI (Geographical Indication) tag.

    Chokuwa Saul

    • Chokuwa rice, a semi-glutinous winter rice type known as Sali rice, carries the legacy of the past.
    • The rice variety is classified into Bora and Chokuwa based on amylose concentration, which affects stickiness.
    • The Chokuwa variant, low in amylose, yields soft rice, referred to as Komal Chaul.
    • This whole grain can be consumed after a preliminary soaking process.
    • Its versatility extends to its application in traditional Assamese delicacies like Pithe and various local dishes.
    • It is primarily cultivated in the Brahmaputra region and various parts of Assam, including Tinsukia, Dhemaji, Dibrugarh, Lakhimpur, Sivasagar, Jorhat, Golaghat, Nagaon, and Morigaon.

    Back2Basics: Geographical Indication (GI)

    • A GI is a sign used on products that have a specific geographical origin and possess qualities or a reputation that are due to that origin.
    • Nodal Agency: Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry
    • India, as a member of the World Trade Organization (WTO), enacted the Geographical Indications of Goods (Registration and Protection) Act, 1999 w.e.f. September 2003.
    • GIs have been defined under Article 22 (1) of the WTO Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS) Agreement.
    • The tag stands valid for 10 years.

    Get an IAS/IPS ranker as your 1: 1 personal mentor

  • Innovations in Biotechnology and Medical Sciences

    Y Chromosome: Unveiling its Secrets and Evolution

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Y Chromosome

    Mains level: Not Much

    y chromosome

    Central Idea

    • The enigmatic Y chromosome, harboring the genetic blueprint of maleness and sperm production, has long intrigued researchers and captured public curiosity.
    • Despite its small size and abundant “junk DNA,” technological advancements have finally granted scientists a comprehensive sequence of the entire Y chromosome.

    What are Chromosomes?

    • Chromosomes are fundamental components of cells that play a vital role in storing and transmitting genetic information.
    • These structures contain genes, which carry instructions for the development, functioning, and inheritance of traits.
    • Chromosomes consist of tightly coiled DNA molecules wrapped around proteins called histones, forming chromatin.
    • Before cell division, chromosomes replicate into identical sister chromatids held together at the centromere.

    Types of Chromosomes:

    1. Autosomes: Non-sex chromosomes (22 pairs in humans) determine most traits.
    2. Sex Chromosomes: Determine biological sex (XX for females, XY for males).

    Functions of Chromosomes

    • Genetic Information Storage: Genes on chromosomes encode instructions for protein production and cellular processes.
    • Inheritance: Chromosomes transmit genetic information during sexual reproduction through meiosis, ensuring genetic diversity in offspring.
    • Gene Expression Regulation: Chromosomes control gene activation or silencing, crucial for development and cell functioning.

    Significance of Chromosomes

    • Understanding Genetic Disorders: Abnormalities in chromosomes cause conditions like Down syndrome, aiding diagnosis and comprehension.
    • Evolutionary Insights: Comparative analysis of chromosomes reveals evolutionary relationships and genetic material changes over time.
    • Advancements in Genetic Research: Chromosomes are crucial for genome sequencing, mapping, and studying gene expression, leading to improved understanding of human health, diseases, and targeted therapies.

    Our focus: Y Chromosome

    1. Genetic Origins: The Y chromosome is believed to have emerged approximately 200-300 million years ago in a common ancestor of mammals. Its genetic sequence, published in 2003, revealed that it accounts for only 2% of the genetic material inside a cell, encoding around 55 genes.
    2. Quirks and Challenges: Referred to as the “juvenile delinquent” among chromosomes, the Y chromosome has repetitive sequences, a limited number of genes, and a reluctance to recombine with other chromosomes. These characteristics have led to debates about its functional utility and evolutionary trajectory.

    Significance of the Y Chromosome

    • Historical Insights: Researchers have extensively studied the Y chromosome to understand human migration and evolution. It has provided valuable insights into paternity, genetic diversity, and our shared past.
    • Beyond Sex Determination: Contrary to earlier assumptions, recent studies have revealed that the Y chromosome plays a role in biological functions beyond sex determination. It contains genes associated with aging, lifespan regulation, and other vital processes.

    Influence of the Y chromosome on Health

    • Sex Differences in Lifespan: In the animal kingdom, including mammals, females tend to live longer than males. The absence of a second Y chromosome in males exposes detrimental mutations in the X chromosome, potentially contributing to shorter lifespans.
    • Age-Related Loss of the Y Chromosome: Studies have shown that men experience a loss of the Y chromosome (LoY) with age, which has been associated with a higher risk of diseases such as cancer and Alzheimer’s. Research on mice models supports these findings, indicating a correlation between LoY and shorter lifespans and memory deficiencies.
    • Phenotypic Sex and Longevity: Recent research on fruit flies challenges the notion that the presence of a Y chromosome directly influences longevity. Instead, the phenotypic sex of an individual, determined by external genitalia, may play a more significant role.

    Future of the Y Chromosome

    • Species-Specific Evolution: Some species, like rodents, have naturally lost their Y chromosome, offering insights into sex-chromosome turnover. These species serve as models for understanding the process and the potential repurposing of other chromosomes as sex chromosomes.
    • Signs of Replacement: Genomic analysis of Neanderthal DNA indicates that the Y chromosome has undergone replacement in the lineage leading to modern humans. This suggests that the Y chromosome’s role as the “master of maleness” may eventually be overtaken by another chromosome in the future.

    Get an IAS/IPS ranker as your 1: 1 personal mentor