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RG

IN CONTEXT

BRANCH

Biology

BEFORE

1866 Gregor Mendel describes laws of inheritance, concluding that inherited characteristics are controlled by discrete particles, later called genes.

1900 Dutch botanist Hugo de Vries reaffirms Mendel’s laws.

1902 Theodor Boveri and Walter Sutton independently conclude that chromosomes are involved in inheritance.

AFTER

1913 Morgan’s student Alfred Sturtevant constructs the first genetic “map,” of the fruit fly.

1930 Barbara McClintock discovers that genes can shift positions on chromosomes.

1953 James Watson and Francis Crick’s double-helix model of DNA explains how genetic information is passed on during reproduction. ...

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