Question

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by?

• A. both sons and daughters
• B. only daughters
• C. only sons
• D. only grandchildren

Answer 1

The correct option is A

both sons and daughters

The correct option is A.

Explanation of correct option:

1. X-linked condition is also known as sex-linked disease.
2. Daughters receive one X chromosome from each parent, whereas, sons receive one X chromosome from the mother.
3. A woman having an X-linked condition on one of her X chromosomes (XX^h), can transmit the affected chromosome to the sons as well as the daughters (Table 1).

Table 1: Pattern of inheritance of X-linked character.

Mother (XX^h) X Father (XY)

Gametes	X	Y
X	XX (Normal daughter)	XY (Normal son)
Xh	XhX (Carrier daughter)	XhY (Diseased son)

Final answer: A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by both sons and daughters.