A child has sickle-cell disease (ss) but neither parent is ill. What must be true of her parents genotypes?

A. the father is heterozygous; the mother is normal

B. both parents are heterozyhous carriers

C. one parent has two ecessive alleles

D. the mother is heterozygous; the father is normal

Question

11 December, 00:06

+1

Answers (2)

Know the Answer?

Collin Walton · Answer 1

Collin Walton 11 December, 00:21

0

I think the answer is B

Liberty Zhang · Answer 2

The answer would be B, because it would mean both parents passed the "s" down to their child from their sets of "Ss".

A child has sickle-cell disease (ss) but neither parent is ill. What must be true of her parents genotypes?A. the father is heterozygous; the mother is normalB. both parents are heterozyhous carriersC. one parent has two ecessive allelesD. the mother is heterozygous; the father is normal