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Solution


Q.

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by             [2018]
1 only daughters  
2 only sons  
3 only grandchildren  
4 both sons and daughters  

Ans.

(4)

Woman acts as a carrier when she has the X-linked condition on one of her X-chromosomes. Both son and daughter inherit X-chromosome from mother. Hence, one of the two daughters will be carrier and one of the two sons will be diseased. It can be explained by the given cross:

where XC is the X-chromosome carrying the gene for the condition.