Help!!! *APEX* Color blindness is a recessive trait. The gene for color blindness is on the X-
chromosome. The family tree below shows the trait of color blindness. The
only unknown is the father in the first generation.
1.
II.
?
What must be true about the father?
OA. He has no recessive color blindness alleles.
B. He has two Y chromosomes.
OC. He is color-blind.
O D. He has two recessive color blindness alleles.