Dominant sex-linked gene B generates white bars on black chickens, as seen in Barred Plymouth Rock breed?
A clutch of chicks has an equal numbers of the barred and black chicks. (Sex is determined by Z-W system in birds: ZW are females, ZZ are males.)
a) If only females are found to be black, what were the genotypes of parents?
b) If males and females are evenly represented in black and barred chicks, what were genotypes of parents?