Essential Genetics 6th Edition by Daniel Hartl

تمرين 1

Coat color in domestic pigs is determined by the alleles of two genes that undergo independent assortment. Genotypes of the form R- S- have red coat color (the dash is a "wild card" meaning that any allele can be present), genotypes rr S- and R- ss have sandy coats, and rr ss are white. In a cross of Rr Ss × Rr Ss, what is expected ratio of red : sandy : white?