Famous Biology Experiments
Experiment↕ | Scientists↕ | Year↕ | Subfield↕ | Discovery↕ | Impact↕ |
|---|---|---|---|---|---|
Mendel's Pea Plant Experiments | Gregor Mendel | 1866 | Genetics | Laws of inheritance through dominant and recessive traits | Founded classical genetics; rediscovered in 1900 and revolutionized biology |
Miller-Urey Experiment | Stanley Miller, Harold Urey | 1953 | Origin of Life | Amino acids form spontaneously from primordial gases with electricity | Showed building blocks of life could arise naturally on early Earth |
Hershey-Chase Blender Experiment | Alfred Hershey, Martha Chase | 1952 | Molecular Biology | DNA, not protein, is the genetic material of bacteriophages | Confirmed DNA as the molecule of heredity shortly before Watson-Crick |
Griffith's Transformation Experiment | Frederick Griffith | 1928 | Microbiology | Bacteria can transfer a 'transforming principle' (later DNA) | First evidence that genetic information can be transferred between cells |
Avery-MacLeod-McCarty Experiment | Oswald Avery et al. | 1944 | Molecular Biology | DNA is the transforming principle in Griffith's pneumococci | Identified DNA as the carrier of genetic information |
CRISPR-Cas9 Gene Editing | Jennifer Doudna, Emmanuelle Charpentier | 2012 | Genetic Engineering | Programmable DNA cleavage using bacterial immune system | Revolutionized gene editing; 2020 Nobel Prize in Chemistry |
Dolly the Sheep | Ian Wilmut, Keith Campbell | 1996 | Cloning | First mammal cloned from an adult somatic cell | Proved adult cells can be reprogrammed; opened era of stem cell biology |
Meselson-Stahl Experiment | Matthew Meselson, Franklin Stahl | 1958 | Molecular Biology | DNA replication is semiconservative | Confirmed the Watson-Crick model of DNA replication |
Fleming's Penicillin Discovery | Alexander Fleming | 1928 | Microbiology | Penicillium mold kills Staphylococcus bacteria | Launched the antibiotic era; saved hundreds of millions of lives |
Luria-Delbruck Fluctuation Test | Salvador Luria, Max Delbruck | 1943 | Genetics | Bacterial mutations arise randomly, not in response to selection | Showed Darwinian evolution applies to bacteria; 1969 Nobel Prize |
Morgan's Fruit Fly Chromosomes | Thomas Hunt Morgan | 1910 | Genetics | Genes are carried on chromosomes (X-linked white eye trait) | Established the chromosome theory of inheritance; 1933 Nobel Prize |
Pasteur's Swan Neck Flask | Louis Pasteur | 1859 | Microbiology | Life does not arise spontaneously; microbes come from microbes | Disproved spontaneous generation; founded germ theory of disease |
Watson and Crick's DNA Model | James Watson, Francis Crick, Rosalind Franklin | 1953 | Molecular Biology | DNA is a double helix | Explained heredity at molecular level; basis of all modern molecular biology |
Human Genome Project | International consortium | 2003 | Genomics | Sequenced all 3 billion base pairs of human DNA | Enabled personalized medicine, pharmacogenomics, evolutionary biology |
Yamanaka's Induced Pluripotent Stem Cells | Shinya Yamanaka | 2006 | Stem Cell Biology | Adult cells can be reprogrammed to pluripotent state with 4 factors | Revolutionized regenerative medicine; 2012 Nobel Prize |
Green Fluorescent Protein (GFP) | Osamu Shimomura, Martin Chalfie, Roger Tsien | 1962 | Cell Biology | Jellyfish protein glows green; usable as biological marker | Transformed cell imaging; 2008 Nobel Prize in Chemistry |
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