Molecular Biology & DNA Architecture: Pioneer Biographies & Lasting Legacies
Encyclopedia/1. The Cosmos & The Natural World/5. Life Sciences • Curated by Admin Timeline.sg
Historical events timeline.
Chronological Storyline (43 Milestones)
Nov 24, 1859 CE
Charles Darwin Publishes On the Origin of Species
Darwin's work provides a framework for evolution by natural selection, laying the foundation for understanding genetic inheritance. #biology #evolution
Charles Darwin Publishes On the Origin of Species By John Murray, Publisher - This image has an extracted file: Origin of Species.jpg., Public domain, https://commons.wikimedia.org/w/index.php?curid=320416
Feb 8, 1865 CE
Gregor Mendel Presents Laws of Inheritance
Mendel's experiments with pea plants reveal dominant and recessive traits, establishing the basic principles of heredity. #genetics #science
Gregor Mendel Presents Laws of Inheritance By Unknown author - NIH, Public domain, https://commons.wikimedia.org/w/index.php?curid=1394893
1869 CE
Friedrich Miescher Isolates DNA
Miescher discovers 'nuclein' from white blood cell nuclei, the first isolation of DNA. #DNA #biochemistry
Friedrich Miescher Isolates DNA By Unknown author - copied from http://www.pbs.org/wgbh/nova/photo51/images/befo-miescher.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=789048
1902 CE
Sutton and Boveri Propose Chromosome Theory
Walter Sutton and Theodor Boveri independently link chromosomes to Mendelian inheritance, establishing that genes reside on chromosomes. #genetics #chromosomes
Sutton and Boveri Propose Chromosome Theory By Walter_sutton.jpg: Unknown Theodor_Boveri.jpg: Unknown derivative work: Earthdirt (talk) - Walter_sutton.jpg Theodor_Boveri.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=8550969
1905 CE
William Bateson Introduces 'Genetics'
Bateson coins the term 'genetics' and champions Mendel's work, helping to establish the new field. #genetics #history
William Bateson Introduces 'Genetics' By Unknown author - https://web.archive.org/web/20051027192232/http://www.amphilsoc.org/library/images/genetics/bateson2.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=671689
1910 CE
Thomas Hunt Morgan Links Genes to Chromosomes
Morgan's work with fruit flies demonstrates that genes are located on chromosomes, earning him the Nobel Prize. #genetics #drosophila
Thomas Hunt Morgan Links Genes to Chromosomes By Unknown author - http://resource.nlm.nih.gov/101422222, Public domain, https://commons.wikimedia.org/w/index.php?curid=549067
1911 CE
Alfred Sturtevant Produces First Genetic Map
Sturtevant, under Morgan, maps gene positions on a chromosome using recombination frequencies. #genetics #mapping
1928 CE
Frederick Griffith's Transformation Experiment
Griffith shows that a 'transforming principle' can transfer genetic traits between bacteria, hinting at DNA as the genetic material. #genetics #transformation
Frederick Griffith's Transformation Experiment By No machine-readable author provided. Madprime assumed (based on copyright claims). - No machine-readable source provided. Own work assumed (based on copyright claims)., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1819839
1931 CE
Barbara McClintock Discovers Genetic Recombination
McClintock's work on maize chromosomes reveals crossing over during meiosis, earning her a Nobel Prize decades later. #genetics #chromosomes
Barbara McClintock Discovers Genetic Recombination By Smithsonian Institution/Science Service; Restored by Adam Cuerden - Flickr: Barbara McClintock (1902-1992)Smithsonian original, Public domain, https://commons.wikimedia.org/w/index.php?curid=25629182
1941 CE
Beadle and Tatum Propose One Gene-One Enzyme
Using Neurospora, Beadle and Tatum show that each gene controls the production of a specific enzyme, linking genes to proteins. #genetics #biochemistry
1944 CE
Avery, MacLeod, and McCarty Identify DNA as Transforming Principle
Their experiment proves that DNA carries genetic information, overturning the belief that proteins were the genetic material. #DNA #genetics
Avery, MacLeod, and McCarty Identify DNA as Transforming Principle By Bbkkk - self-made in the Naturkunste Museum in Berlin, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=3679283
1950 CE
Erwin Chargaff Formulates Base Pairing Rules
Chargaff discovers that in DNA, adenine equals thymine and guanine equals cytosine, a key clue to the double helix. #DNA #biochemistry
Erwin Chargaff Formulates Base Pairing Rules By Christinelmiller - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=79905324
1952 CE
Hershey and Chase Confirm DNA as Genetic Material
Using bacteriophages, they show that only DNA enters bacterial cells, confirming DNA's role in heredity. #DNA #genetics
Hershey and Chase Confirm DNA as Genetic Material By Thomasione - Modified from German Wikipedia [1], GFDL, https://commons.wikimedia.org/w/index.php?curid=15034881
Apr 25, 1953 CE
Watson and Crick Propose Double Helix Model
Using Rosalind Franklin's X-ray crystallography data, Watson and Crick reveal the double helix structure of DNA, revolutionizing biology. #DNA #structure
1955 CE
Eugene Kennedy Discovers DNA Replication Enzymes
Kennedy identifies the first enzyme involved in DNA replication, paving the way for understanding DNA synthesis. #DNA #replication
Eugene Kennedy Discovers DNA Replication Enzymes By Kcdstl - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=81876976
1958 CE
Meselson and Stahl Prove Semiconservative Replication
Their elegant experiment demonstrates that DNA replication is semiconservative, confirming a key prediction of the double helix model. #DNA #replication
1961 CE
Nirenberg and Matthaei Crack the First Genetic Code
They decipher that the codon UUU codes for phenylalanine, initiating the decoding of the genetic code. #genetics #geneticcode
Nirenberg and Matthaei Crack the First Genetic Code By NIH History Office from Bethesda - J. Heinreich Matthaei and Marshall Nirenberg, Public domain, https://commons.wikimedia.org/w/index.php?curid=82867048
1961 CE
Jacob and Monod Propose the Operon Model
They describe the operon as a unit of gene regulation in bacteria, founding the field of gene expression regulation. #genetics #regulation
1965 CE
Har Gobind Khorana Synthesizes First Artificial Gene
Khorana's team chemically synthesizes a gene, advancing genetic engineering and earning him a share of the Nobel Prize. #genetics #synthesis
Har Gobind Khorana Synthesizes First Artificial Gene By Unknown author - http://www.nobelprize.org/nobel_prizes/medicine/laureates/1968/, Public domain, https://commons.wikimedia.org/w/index.php?curid=194932927
1970 CE
Discovery of Restriction Enzymes
Hamilton Smith and Daniel Nathans discover the first restriction enzymes, tools that cut DNA at specific sequences, enabling molecular cloning. #DNA #enzymes
1972 CE
Paul Berg Creates First Recombinant DNA Molecule
Berg combines DNA from different organisms, creating the first recombinant DNA and launching genetic engineering. #geneticengineering #DNA
Paul Berg Creates First Recombinant DNA Molecule By Unknown author - http://profiles.nlm.nih.gov/CD/B/B/L/L/, Public domain, https://commons.wikimedia.org/w/index.php?curid=3702286
1973 CE
Cohen and Boyer Pioneer Genetic Engineering
Stanley Cohen and Herbert Boyer develop methods to insert foreign DNA into plasmids and express genes in bacteria, founding the biotech industry. #biotech #geneticengineering )
Cohen and Boyer Pioneer Genetic Engineering By Unknown author - https://www.nobelprize.org/prizes/medicine/1986/cohen/facts/, Public domain, https://commons.wikimedia.org/w/index.php?curid=182894690
Frederick Sanger Develops DNA Sequencing Method By Estevezj - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=23264166
1977 CE
Roberts and Sharp Discover RNA Splicing
They independently discover that eukaryotic genes contain introns and exons, and RNA splicing removes introns. #RNA #genetics
Roberts and Sharp Discover RNA Splicing By Original: Iinaba Vector: Masumrezarock100 - https://commons.wikimedia.org/w/index.php?title=File:Splicesome.pdf, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=115983282
1983 CE
Kary Mullis Invents the Polymerase Chain Reaction (PCR)
PCR revolutionizes DNA amplification, enabling countless applications in genetics, diagnostics, and forensics. #PCR #DNA
Kary Mullis Invents the Polymerase Chain Reaction (PCR) By Madprime - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=2104468
1984 CE
Alec Jeffreys Develops DNA Fingerprinting
Jeffreys discovers variable number tandem repeats (VNTRs) and creates the first DNA fingerprint, changing forensic science. #forensics #DNA
Alec Jeffreys Develops DNA Fingerprinting By Jane Gitschier - PLoS Genetics, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=22003040
Oct 1, 1990 CE
Human Genome Project Begins
An international effort to sequence the entire human genome, catalyzing genomics and personalized medicine. #genomics #science
Human Genome Project Begins By U.S. Department of Energy, Human Genome Project - http://www.ornl.gov/hgmis, Public domain, https://commons.wikimedia.org/w/index.php?curid=2485616
1995 CE
First Bacterial Genome Sequenced (Haemophilus influenzae)
The first complete genome of a free-living organism, H. influenzae, is sequenced using whole-genome shotgun sequencing. #genomics #bacteria
First Bacterial Genome Sequenced (Haemophilus influenzae) By Stefan Walkowski - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=41492226
Jul 5, 1996 CE
Dolly the Sheep Cloned
Ian Wilmut and colleagues clone Dolly from an adult somatic cell, demonstrating that differentiation is reversible. #cloning #stemcells )
Feb 19, 1998 CE
First Animal Genome (C. elegans) Sequenced
The nematode C. elegans becomes the first multicellular organism to have its genome fully sequenced. #genomics #research
First Animal Genome (C. elegans) Sequenced By The original uploader was Kbradnam at English Wikipedia. (Original text: Zeynep F. Altun, Editor of www.wormatlas.org) - Transferred from en.wikipedia to Commons. (Original text: Donated by Zeynep F. Altun), CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=2680458
Jun 26, 2000 CE
Draft Human Genome Announced
President Bill Clinton and Prime Minister Tony Blair announce the completion of a draft sequence of the human genome. #genomics #human
2002 CE
Andrew Fire and Craig Mello Discover RNA Interference
They show that double-stranded RNA can silence genes, revealing a novel regulatory mechanism and earning the Nobel Prize. #RNA #gene_silencing
Andrew Fire and Craig Mello Discover RNA Interference By Dan Cojocari ✉·✍· - Own, This W3C-unspecified vector image was created with Adobe Illustrator., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8697221
Apr 14, 2003 CE
Human Genome Project Completed
The finished human genome sequence is released ahead of schedule, with 99% of the euchromatic genome sequenced. #genomics #science
Technologies like 454 and Illumina massively parallelize sequencing, dramatically reducing cost and enabling many new applications. #sequencing #genomics
Next-Generation Sequencing Revolutionizes Genomics By Original: Darekk2, SVG: Palosirkka - File:Hybridogenesis in water frogs gametes.gif, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=67142604
Yamanaka shows that adult cells can be reprogrammed to a pluripotent state, revolutionizing regenerative medicine. #stemcells #reprogramming
Shinya Yamanaka Discovers Induced Pluripotent Stem Cells By NIH Image Gallery from Bethesda, Maryland, USA - Human induced pluripotent stem cell colony, Public domain, https://commons.wikimedia.org/w/index.php?curid=114900547
May 31, 2007 CE
James Watson's Personal Genome Sequenced
Watson's genome is the first to be fully sequenced for an individual, marking an era of personal genomics. #genomics #personal
James Watson's Personal Genome Sequenced By Newspaper Enterprise Association - This image is available from the United States Library of Congress's Prints and Photographs division under the digital ID cph.3c37336.This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing., Public domain, https://commons.wikimedia.org/w/index.php?curid=189390308
Jun 28, 2012 CE
CRISPR-Cas9 Gene Editing Discovered
Emmanuelle Charpentier and Jennifer Doudna show that CRISPR-Cas9 can be programmed to cut DNA, revolutionizing gene editing. #CRISPR #geneediting
CRISPR-Cas9 Gene Editing Discovered By Deposition authors: Nishimasu, H., Ishitani, R., Nureki, O.; Visualization author: Synpath - Atom coordinates: https://www.rcsb.org/structure/4OO8; Visualization: Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=133423568
Oct 22, 2014 CE
Base Editing Developed by David Liu
Liu's lab creates base editors that chemically alter DNA bases without double-strand breaks, expanding editing precision. #geneediting #biotech
Base Editing Developed by David Liu By Mazhar Adli - review article : The CRISPR tool kit for genome editing and beyond DOI: 10.1038/s41467-018-04252-2, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=81074194
Apr 18, 2015 CE
First Gene Editing of Human Embryos in China
Chinese researchers use CRISPR to modify human embryos, raising ethical questions and safety concerns. #CRISPR #ethics
Nov 26, 2018 CE
He Jiankui Claims First Gene-Edited Babies
Chinese scientist He Jiankui announces the birth of twins with edited CCR5 genes, sparking global controversy. #CRISPR #controversy
He Jiankui Claims First Gene-Edited Babies By The He Lab - This image has been extracted from another file, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=74768423
Oct 21, 2019 CE
Prime Editing Introduced by David Liu
Prime editing offers precise search-and-replace genome editing with fewer off-target effects. #geneediting #CRISPR
Prime Editing Introduced by David Liu By Ciencias Españolas KoS - File:ADN_2.png File:Pince_a_épiler.png, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=75624775
Mar 11, 2020 CE
WHO Declares COVID-19 a Pandemic; Rapid Sequencing of SARS-CoV-2 Genome
The SARS-CoV-2 genome is quickly sequenced and shared, enabling vaccine development and diagnostic tests. #COVID19 #genomics
WHO Declares COVID-19 a Pandemic; Rapid Sequencing of SARS-CoV-2 Genome By NIAID-RML (https://www.niaid.nih.gov/ & https://www.niaid.nih.gov/about/rocky-mountain-laboratories) - https://www.flickr.com/photos/niaid/49534865371/ (flikr), CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=92612457
Dec 8, 2023 CE
First CRISPR-Based Therapy Approved (Casgevy)
The FDA and MHRA approve Casgevy (exagamglogene autotemcel) for sickle cell disease and beta-thalassemia, a landmark in gene therapy. #CRISPR #genetherapy
