Calico Cats Are Never Male Because

Multiple Choice

Calico cats are never male because:

A) recessive genes are not usually expressed on their X chromosome.
B) male hormones prevent expression of the calico phenotype.
C) two different X chromosomes are needed for the expression of the calico phenotype.
D) two different Y chromosomes are needed for the expression of the calico phenotype.
E) one X chromosome and one Y chromosome are needed for the expression of the calico phenotype.