Brown eyes are dominant over blue eyes. If two brown-eyed parents have a child with blue eyes, what does it mean about the parents’ genotype?
A. One must be homozygous recessive.
B. One must be heterozygous.
C. They must both be heterozygous.
D. They must both be homozygous dominant
Answer (2)
Both brown-eyed parents must be heterozygous (Bb) for a child to inherit blue eyes (bb). This is because they both need to provide a recessive blue allele for the blue-eyed trait to be expressed. Hence, the correct option is C.
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C. They must both be heterozygous ;
