In chickens, it is the females that have two different sex chromosomes (Z and W)

Question

In chickens, it is the females that have two different sex chromosomes (Z and W) while the males have two Z chromosomes, A Z-linked gene controls the pattern of the feathers, with the dominant B allele causing the barred pattern and the h allele causing non-barred feathers. From which of the following crosses would all of the daughters be of one phenotype (barred or non-barred) and all of the sons the oilier phenotype? barred females x non-barred males non-barred females x barred males non-barred females x non-barred males barred females x barred males

Explanation / Answer

Answer: a. Barred females x non-barred males

Explanation:

Male chicken ZZ

Female Chicken ZW

Barred=B

non-barred=b

ZBW (Barred females) x ZZ (non-barred males)

Offsprings:

Males: ZBZ, ZBZ, (all are barred)

Females: ZW, ZW (all are non-barred)

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