In birds, males are homogametic sex (XX), females are heterogametic (XY). Light Sussex fowls have mostly white plumage (feathers
), and Rhode Island fowls have mostly red. The character white-feathered (R) is dominant to the character red (). 2.1 Explain why, on mating Rhode Island cockereis with white Sussex hens, all male offspring have white plumage and all females red. [18]
When mating the white feathered trait is dominate while the red feathered is resesive so both parents would have to have red feathers for there offspring to have red feathers.
