If a woman is a carrier for the color-blind recessive allele and her husband has normal vision,what are their chances that a son will be color-blind?
A)None,because the father is normal.
B)50%,since the mother is only a carrier.
C)100% because the mother has the gene.
D)25% because the mother is a hybrid.
E)None since the son will also be just a carrier.

Question

Quizplus · Accepted Answer

A son inherits his X chromosome from his mother and Y chromosome from his father. Since the mother is a carrier, there is a 50% chance she will pass the color-blind allele to her son, making him color-blind.

If a Woman Is a Carrier for the Color-Blind Recessive