Genetics

Key people

• Gregor MendelMoravian scientist and Augustinian friar (1822–1884)
• James WatsonAmerican molecular biologist, geneticist, zoologist and Nobel Laureate (1928–2025)
• Francis CrickBritish molecular biologist, biophysicist, neuroscientist; co-discoverer of the structure of DNA
• Barbara McClintockAmerican scientist and cytogeneticist

Timeline

• 1900The importance of Mendel's work did not gain wide understanding until 1900, after his death, when Hugo de Vries and other scientists rediscovered his research.
• 2015In April 2015, Chinese researchers reported results of basic research to edit the DNA of non-viable human embryos using CRISPR.

Read

• Introduction to genetic analysisAnthony J. F. Griffiths · 1993Book
• Human GeneticsRicki Lewis · 1993Book
• The Genetic CodeIsaac Asimov · 1936Book
• Advances in geneticsJeffrey C. Hall · 1996Book

Watch

• The Hershey and Chase Experiment | Discovery of DNA as the genetic materialYouTube
• What is DNA and How Does it Work?YouTube
• How CRISPR lets you edit DNA - Andrea M. HenleYouTube
• THE MOST BEAUTIFUL EXPERIMENT IN BIOLOGY: Meselson & Stahl, The Semi-Conservative Replication of DNAYouTube
• Stephen Meyer Unmasks The Coding Of Human DNA (Science Uprising EP3)YouTube
• Rosalind Franklin: DNA's unsung hero - Cláudio L. GuerraYouTube
• DNA, Chromosomes, Genes, and Traits: An Intro to HeredityYouTube
• History of DNA DiscoveryYouTube
• What Is DNA for Kids | An easy overview of DNA for children | Awesome DNA FactsYouTube
• Introduction to Genetics - DNA, RNA, Genes, Nucleosides, Nucleotides, Transcription, TranslationYouTube

Listen

• The Genetics PodcastSano GeneticsPodcast
• DNA Today: A Genetics PodcastKira Dineen, Gene Pool MediaPodcast
• GeneticsOxford UniversityPodcast
• Genetics in Your WorldGenetics Society of AmericaPodcast

Voices to follow

• Andrew Hessel@andrewhessel · XAmerican geneticist
• Elizabeth Silva@lizatucsf · XBiomedical researcher
• Sonja A. Rasmussen@skr9skr9 · XAmerican pediatrician and medical geneticist
• Nicholas Miliaras@nbmiliaras · XResearcher ORCID = 0000-0001-8624-7781

Debates

• Should human gene editing be used for enhancement beyond disease prevention?One view: Yes, gene editing could improve human capabilities and prevent future suffering from genetic predispositions. · Another: No, it raises ethical concerns about inequality, unintended consequences, and defining 'normal' human traits.Open question
• Should individuals have absolute control over their genetic information, even if it hinders public health research?One view: Yes, genetic data is deeply personal and individuals should have full autonomy over its use and privacy. · Another: No, sharing anonymized genetic data can significantly advance medical research and benefit public health initiatives.Open question
• Are complex human traits, like intelligence or personality, primarily determined by genetics or environment?One view: Genetics plays a fundamental role, providing the blueprint and predisposing individuals to certain traits and potentials. · Another: Environmental factors, upbringing, and experiences heavily shape how genetic predispositions are expressed and developed.Open question

Glossary

• DNADeoxyribonucleic acid, the molecule carrying genetic instructions for all living organisms.
• GeneA segment of DNA that codes for a specific protein or functional RNA molecule.
• ChromosomeA thread-like structure of DNA and proteins found in the nucleus, carrying genetic information.
• AlleleOne of two or more alternative forms of a gene found at the same place on a chromosome.
• MutationA permanent alteration in the DNA sequence that makes up a gene.
• GenomeThe complete set of genetic material present in a cell or organism.

Careers

Roles this can lead toward

Student research

Published policy papers by One Young India delegates — every delegate leaves published under their own name.

• The Philadelphia Experiment: Deconstruction of a Military Myth and PseudoscienceDwij Verma
• Beyond the Genome: Dynamic Epigenetics and the Future of Precision MedicineShaan Soni

Threads 11

Where this connects to other fields — and why it's worth knowing.

• Developmental Psychology Psychology

  Really bad stress in early childhood can leave chemical 'sticky notes' on your genes, tags that don't change the DNA itself but change which genes get switched on. Years later those notes can raise the odds of heart disease or depression. It's trauma from age five, quietly written under the skin and read out decades on.

• Semiotics & Visual Culture Arts

  In DNA, a three-letter code stands for a specific building block of protein, but which letters mean what is pure convention, not chemistry, they could have meant something else. That's exactly how words work: the sound 'dog' doesn't have to mean dog. DNA is a symbol system, a language frozen in place by evolution.

• Socialisation & the Self Sociology

  How you were raised, neglect or warmth, doesn't just shape your behavior; it can flip chemical switches sitting on your genes, turning some up or down. That means your childhood gets physically written onto your DNA. Startlingly, some of those marks can even be passed down to your own kids.

• Kinship & Family Sociology

  There's actual math behind why we look out for blood relatives: help a relative when how closely you're related, times how much it helps them, beats what it costs you (Hamilton's rule). Since you share half your genes with a sibling and an eighth with a cousin, 'you'd risk your life for two siblings or eight cousins' comes out of the arithmetic. Family love has a hidden formula written in genes.

• Migration & Diaspora Sociology

  When a small group of people breaks off, settles somewhere isolated, and multiplies, whatever rare genes those few founders happened to carry become weirdly common in their descendants. That's the founder effect. It's why certain inherited diseases cluster in groups like Ashkenazi Jews, Afrikaners, and island peoples, not bad luck or a curse, just the math of starting a population from a handful of people.

• Nutrition Health

  During a brutal 1944 famine in the Netherlands, pregnant women went hungry. Decades later, their now-elderly children still carried chemical 'switches' on their genes flipped by that starvation. A mother's diet didn't change the DNA letters, but it quietly changed how those genes behaved for an entire lifetime.

• Data Privacy Law Law

  You can protect your own DNA, but you can't speak for your relatives. Police caught the Golden State Killer because a distant cousin uploaded their DNA to a genealogy site. Your genes are partly shared with everyone you're related to, so their choice exposes you.

• Education and Social Mobility Sociology

  Here's a twist that bugs everyone: the fairer and more equal a society is, the more your genes seem to shape how far you get. When everyone has good schools and enough food, those big outside obstacles stop being the deciding factor, so natural differences show up more. Level the playing field, and biology's role gets louder, not quieter.

• Ancient Civilizations History

  Some people can drink milk as adults and others can't — that's written in your genes. And that gene only spread after humans started farming and keeping cattle. So building the first civilizations actually rewrote human DNA.

• Endangered and Dying Languages Literature

  Long before DNA, language detectives built family trees of languages by tracking how sounds slowly changed, like how Latin split into Spanish and French. A century later, biologists used the exact same branching trick to trace ancestry from tiny changes in DNA. Same logic, two totally different codes.

• The Caste System Sociology

  For thousands of years, caste rules meant people only married within their own group. That social habit left a real mark in DNA: distinct genetic patterns and clusters of certain diseases. A hierarchy invented in people's minds ended up printed in their genes.