In chickens, sex is determined on sex chromosomes W and Z. To be a female you have a h… Show more SHOW ALL WORK In chickens, sex is determined on sex chromosomes W and Z. To be a female you have a heterozygous WZ chromosome type and to be male you have ZZ chromosome type. It has been found that beak color is carried on the Z chromosome, it being incompletely dominant between red and yellow giving a heterozygous orange (Rr) color. Also found on the Z chromosome is the trait for the color of the comb. The pattern is Co-Dominant between blue and black giving a striped heterozygous condition (Bb). IN addition there are two Autosomal traits. The first is a trait that determines if the comb is (Cc) present or missing, having a comb is the dominant condition. The second autosomal trait is a multi-allelic trait that determines the shape of the wattle with square wattle (i S ) being dominant to round (i R ) and triangle (i T ) and round (i R ) dominant to triangle (i S ), thus triangle is only expressed if homozygous. If you Cross a Rooster with an orange beak and a striped comb and square wattle who’s father kicked a comb and had a triangle shaped wattle and whose mother had a black comb and a yellow beak with a hen who has a red beak, a blue comb, and a heterozygous round wattle whose parents were homozygous dominant for a comb • Show less