Question

In the example we just saw, if a father passes on a certain disease to all his daughters, he would have a defective allele on the ________ chromosome.

• A. X
• B. Y
• C. Either X or Y
• D. Either X and Y

Answer 1

The correct option is A

X

All female offspring get one of the X chromosomes from their father. If this chromosome happens to carry a defective allele, the daughters would inherit the disease.