DNA Timeline- Anabelle Kim - 1st hour
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Wurde aktualisiert: 1 Dez 2017
Important people that contributed to the discovery of information about DNA
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Erwin Chargaff discovered that guanine units
equal the number of cytosine units and the
number of adenine units equals the number of
thymine units. He also discovered that the
relative amounts of A, G, T, and C varied from
species to species.Oswald Avery was one of the first molecular
microbiologists, however, he is mostly known
for conducting an experiment that broke down
DNA in heat-killed bacteria. He discovered that
chromosomes and genes are made up of DNA.Frederick Griffith conducted an experiment, that
would later inspire Avery's experiment. Griffith
discovered that heat-killed, disease-causing
bacteria have a factor that can transform
harmless bacteria into a disease.Alfred Hershey and Martha Chase studied
bacteriophage. They are known for conducting
their famous Hersey-Chase experiment. They
discovered that phage DNA was not a protein,
but genetic material.Rosalind Franklin is known for
discovering that the structure of
DNA is similar to a twisted ladder.
She discovered this by using a
technique called x-ray crystallography.James Watson and Frances Crick
were credited with discovering the
double helix structure of the DNA
molecule. Watson, Crick, along with
another scientist Maurice Wilkins,
received a noble prize.Matthew Meselson and Franklin Stahl are known
for conducting the Meselson–Stahl experiment.
The experiment proved Watson and Crick's
theory that DNA replication was
semiconservative. Their experiment has been
called "the most beautiful experiment in
biology."Gregor Mendel discovered the fundamental
laws of inheritance through his experiment with
pea plants. He disovered the law of segregation,
the law of independent assortment, and the law
of dominance.Thomas H. Morgan is credited with
discovering the chromosomal
theory of inheritance. His experiment
with fruit flies demonstrated
sex-linked inheritance patterns.Reiji Okazaki discovered that the lagging strand
of DNA is replicated by fragments, later known
as Okazaki fragments.Reginald Punnett is known for the discovery of
the Punnett square, which calculates the
number and variety of genetic combinations.
Punnett along with William Bateson discovered
gene linkage, otherwise known as coupling.Walther Flemming was the first person to
describe the chromosomal movements in
mitosis. He saw that chromosomes doubled in
prophase and divided in cytokinesis.Nettie Maria Stevens was one of the first female
scientists to be famous in biological sciences.
She discovered that specific chromosomes
determine gender.Alfred Sturtevant was a student of Thomas Hunt
Morgan. Sturtevant discovered that genes get
shuffled when chromosomes exchange pieces.
He published the worlds first genetic map.Charles Robert Darwin was known for
discovering Darwinism or evolution. He
discovered that evolution began the inheritance
of a gene variation.
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