Question

A woman (but not her husband) suffers from an autosomal dominant condition. This condition is expected to be phenotypically expressed in what percent of her offspring?

	a.	25%
	b.	33%
	c.	50%
	d.	75%

Answer 1

Ans. (C)

As the condition is autosomal dominant the genotype of women must be AA or Aa. whereas, the genotype of her husband must be aa.

if the genotype of the women is AA then all of her offsprings must be phenotypically expressing this condition but 100 percent is not an option to choose. so i am assuming that the women must be heterozygous i.e., Aa

	a	a
A	Aa	Aa
a	aa	aa

As the cross shows this condition is expected to be phenotypically expressed in 50 %  of her offspring i.e., the Aa individuals.