In One Family, All Three Children Are Homozygous for a Recessive

question 146

Multiple Choice

In one family, all three children are homozygous for a recessive gene. What can be concluded about the parents?

• A) Each parent is also homozygous for the recessive gene.
• B) Each parent is heterozygous.
• C) One parent is homozygous for the dominant gene; the other is homozygous for the recessive gene.
• D) Each parent is either homozygous for the recessive gene or heterozygous.

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