Untitled timeline

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Charles Darwin, Alfred Russel, Wallace

1858

Joint announcement of the theory of natural selection-that members of a population who are better adapted to the environment survive and pass on their traits.

Charles Darwin

1859

Published The Origin of Species

Gregor Mendel

1866

Published the results of his investigations of the inheritance of "factors" in pea plants.

Carl Correns Hugo de Vries Erich von Tschermak

1900

Mendel's principles were independently discovered and verified, marking the beginning of modern genetics.

Nettie Stevens ,Edmund Wilson

1905

Independently described the behavior of sex chromosomes-XX determines female; XY determines male.

Oswald Avery Colin MacLeod Maclyn McCarty

1944

Reported that they had purified the transforming principle in Griffith's experiment and that it was DNA.

Paul Berg, Herb Boyer

1972

Produced the first recombinant DNA molecules.

Annie Chang ,Stanley Cohen

1973

Showed that a recombinant DNA molecule can be maintained and replicated in E. coli.

Fred Sanger

1977

Developed the chain termination (dideoxy) method for sequencing DNA.

James Gusella

1983

Used blood samples collected by Nancy Wexler and her co-workers to demonstrate that the Huntington's disease gene is on chromosome 4.