Question #6423294Single Choice

Biology

Question

A child has a genetic disorder caused by a recessive allele. Which of the following must be true about the child's parents?

Both parents must be homozygous recessive.

One parent must be homozygous dominant, and the other must be homozygous recessive.

Both parents must carry at least one copy of the recessive allele.

One parent must be heterozygous, and the other must be homozygous recessive.

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