Activity 9: SEX-LIMITED TRAITS In fruit flies, humans, and other mammals, sex is determined by an X-Y system. However many organisms do not have the X-Y system of sex determination For example birds have a Z-W system. Male birds are ZZ whereas females are ZW. In chickens barred feathers (2) are dominant over the non-barred feathers (Zb)

1. Draw a punnet square that shows the results of a cross between a barred female and non-barred male​