A woman with sickle-cell disease mates with a man with sickle-cell trait (a heterozygous carrier). What is the chance they will have a child with sickle-cell anemia. 1) 75% 2) 25% 3) 50% 4) 100% 5) 0%
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The woman with sickle-cell disease has genotype aa (two copies of the recessive allele). The man with sickle-cell trait (heterozygous carrier) has genotype Aa (one copy of the normal allele and one copy of the recessive allele). Show more…
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