Question

If the father is affected by an X linked dominant disorder then

• A. All the progenies will be affected
• B. All sons will be affected
• C. All daughters will be affected
• D. Disorders in male progenies will be dependent on the mother

Answer 1

Answer: (C), (D)

The correct options are
C

All daughters will be affected

D

Disorders in male progenies will be dependent on the mother

Since the father has a dominant X chromosome with a defective allele, all his daughters will inherit the defect. Sons inheriting the disease depend on the allele inherited from the mother. If the chromosome obtained from mother is a dominant, then the son will also be affected. If the obtained chromosome from mother is normal, then the son will be unaffected.