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40 Mutiple Choce Worth 2 pots (03 03, 03 04 MC) for a
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Answer #1

Correct answer for this question is option

D. One parent is homozygous for straight hairline and the other is heterozygous.

EXPLANATION:

As Widows peak is a autosomal dominant inheritance,

A. If one parent is homozygous to straight hairline and other is homozygous to widows peak, the result will be all of the offspring are heterozygous displaying dominant widows peak.

B. If both the parents are homozygous for widows peak, all the offspring will also be homozygous and display widows peak.

C. If both the parents are homozygous for straight hair line, all the offspring will also be homozygous and display straight hairline.

D. If one parent is homozygous for straight hairline and the other is heterozygous then half of the offspring will homozygous for straight hairline and other half will be heterozygous and display widows peak.

According to information given inthe question, option D is correct.

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