Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers

تمرين 17

In certain cattle, hair color can be red (homozygous R 1 R 1 ), white (homozygous R 2 R 2 ), or roan (a mixture of red and white hairs, heterozygous R 1 R 2 ).
a. When a red bull is mated to a white cow, what genotypes and phenotypes of offspring could be obtained?
b. If one of the offspring bulls in part (a) were mated to a white cow, what genotypes and phenotypes of offspring could be produced? In what proportion?