Mendel
Investigating what happens
in the transmission of
hereditary traits
Cross-bred homozygous
green (dominant gene)
and yellow (recessive gene)
pea plants, then continued
breeding the offspring for
a total of 4 generations
Inheritance of traits is
determined by "units,"
which are now known as genes
An offspring inherits one
allele from each parent (1 janv. 1856 – 1 janv. 1863)