This timeline traces the global history of genomics and gene editing, from early classical genetics to modern CRISPR-based therapies. It highlights multi-contributions across civilizations, including key discoveries from Asia, Europe, the Americas, and the Middle East, and explores the scientific and ethical milestones that shaped the field.
Gregor Mendel's experiments on pea plants establish the fundamental laws of heredity, laying the groundwork for genetics. #genetics #history
Danish botanist Wilhelm Johannsen introduces the term 'gene' to describe the fundamental unit of heredity. #genetics #terminology
Thomas Hunt Morgan's work with fruit flies demonstrates that genes are located on chromosomes. #genetics #chromosomes
Oswald Avery and colleagues show that DNA, not protein, carries genetic information in bacteria. #DNA #genetics
Alfred Hershey and Martha Chase use phage radioactive labeling to prove DNA is the genetic material. #DNA #virology
James Watson and Francis Crick, using Rosalind Franklin's X-ray data, publish the double-helix structure of DNA. #DNA #structure
Matthew Meselson and Franklin Stahl confirm that DNA replication is semi-conservative using density-gradient centrifugation. #DNA #replication
Marshall Nirenberg and Heinrich Matthaei decipher the first codon (UUU) coding for phenylalanine. #geneticcode #biochemistry
Indian-American biochemist Har Gobind Khorana chemically synthesizes a complete gene, a yeast alanine tRNA gene. #syntheticbiology #genomics
Hamilton Smith and Daniel Nathans isolate the first restriction enzyme (HindII), enabling DNA cutting and manipulation. #molecularbiology #enzymes
Paul Berg and colleagues create the first recombinant DNA molecule by combining SV40 virus and lambda phage DNA. #biotechnology #recombinantDNA
Stanley Cohen and Herbert Boyer use restriction enzymes and plasmids to create the first recombinant bacterium. #geneticengineering
Scientists gather to establish voluntary guidelines for recombinant DNA research, addressing biosafety concerns. #bioethics #regulation
Frederick Sanger introduces chain-termination sequencing, enabling rapid reading of DNA base sequences. #sequencing #genomics
Kary Mullis conceives the polymerase chain reaction (PCR), a technique to amplify DNA exponentially. #PCR #molecularbiology
Alec Jeffreys develops DNA fingerprinting, using variable number tandem repeats (VNTRs) for identification. #forensics #genetics
Japanese scientist Yoshizumi Ishino discovers unusual repeated sequences in E. coli DNA, later named CRISPR. #CRISPR #microbiology
An international consortium begins the Human Genome Project to sequence all 3 billion base pairs of human DNA. #genomics #HGP
Ian Wilmut and colleagues at the Roslin Institute clone Dolly the sheep from an adult somatic cell. #cloning #biotechnology
Andrew Fire and Craig Mello describe RNA interference (RNAi), a mechanism for gene silencing. #RNAi #genetics
Chromosome 22 is fully sequenced as part of the Human Genome Project. #genomics #chromosome22
President Bill Clinton and Prime Minister Tony Blair announce the completion of a working draft of the human genome. #genomics #announcement
The International Human Genome Sequencing Consortium publishes the human genome sequence in Nature and Science. #genomics #publication
The International Rice Genome Sequencing Project (IRGSP) completes the high-quality draft of the rice genome, a major advance for agriculture. #genomics #rice
The Human Genome Project officially ends, having sequenced 99% of the human genome with 99.99% accuracy. #genomics #milestone
The HapMap project maps haplotype patterns in multiple populations to aid genome-wide association studies. #genomics #variation
454 Life Sciences launches the first next-generation sequencer (GS 20), dramatically increasing sequencing speed. #NGS #sequencing
An international collaboration aims to sequence genomes from 1,000 individuals to capture human genetic variation. #genomics #variation
J. Craig Venter and colleagues create the first self-replicating bacterium with a synthetic genome (Mycoplasma mycoides JCVI-syn1.0). #syntheticbiology #genomics
Emmanuelle Charpentier and Jennifer Doudna demonstrate that CRISPR-Cas9 can be programmed to cut specific DNA sequences in vitro. #CRISPR #geneediting
Feng Zhang and colleagues use CRISPR-Cas9 to edit genes in human embryonic 293T cells. #CRISPR #human
Chinese scientists led by Junjiu Huang edit the genomes of non-viable human zygotes, sparking ethical debates. #CRISPR #embryo #ethics
Researchers suggest using CRISPR to create gene drives that spread altered genes through populations, aiming to control disease vectors. #genedrive #biotechnology
A US patient receives the first CRISPR gene-editing therapy inside the body to correct a genetic eye disease. #CRISPR #therapy
Chinese researcher He Jiankui claims to have created the first gene-edited babies, David and Nana, using CRISPR to confer HIV resistance, leading to global condemnation. #CRISPR #ethics #controversy
A patient with sickle cell disease is successfully treated with CRISPR therapy (CTX001) in a clinical trial. #CRISPR #sicklecell
Emmanuelle Charpentier and Jennifer Doudna win the Nobel Prize in Chemistry for developing the CRISPR-Cas9 gene-editing tool. #CRISPR #Nobel
Base editing, a precise form of gene editing that changes single DNA bases without double-strand breaks, begins clinical trials. #baseediting #genetherapy
The Telomere-to-Telomere (T2T) Consortium publishes the first truly complete human genome sequence, filling gaps left by the HGP. #genomics #T2T
The UK's MHRA approves Casgevy (exagamglogene autotemcel) for sickle cell disease and beta-thalassemia, the first CRISPR-based therapy to receive marketing authorization. #CRISPR #therapy #approval