<P> The proposal that chromosomes carried the factors of Mendelian inheritance was initially controversial , but in 1913 it gained strong support when Eleanor Carothers documented definitive evidence of independent assortment of chromosomes in a species of grasshopper . Debate continued , however , until 1915 when Thomas Hunt Morgan 's work on inheritance and genetic linkage in the fruit fly Drosophila melanogaster provided incontrovertible evidence for the proposal . The unifying theory stated that inheritance patterns may be generally explained by assuming that genes are located in specific sites on chromosomes . </P>
<P> The proposal that chromosomes carried the factors of Mendelian inheritance was initially controversial , but in 1913 it gained strong support when Eleanor Carothers documented definitive evidence of independent assortment of chromosomes in a species of grasshopper . Debate continued , however , until 1915 when Thomas Hunt Morgan 's work on inheritance and genetic linkage in the fruit fly Drosophila melanogaster provided incontrovertible evidence for the proposal . The unifying theory stated that inheritance patterns may be generally explained by assuming that genes are located in specific sites on chromosomes . </P>
who proved that genes are located on chromosomes
who proved that genes are located on chromosomes
Thomas Hunt Morgan 's
Thomas Hunt Morgan 's