What does it mean to be a carrier of sickle cell anemia?

What does it mean to be a carrier of sickle cell anemia?

• A. Having a homozygous genotype (DD) and having disease.
• B. Having a heterozygous genotype (Dd) with disease symptoms.
• C. Having a heterozygous genotype (Dd) with no disease but potential to transmit.
• D. Having two normal alleles (DD) with no risk to transmit.

Answer: (C)

Being a carrier for sickle cell anemia means you have one normal allele and one sickle allele, so you are heterozygous. The normal allele typically masks the disease, so you don’t show disease symptoms. But you can pass the sickle cell allele to your children. If the other parent is also a carrier, there’s a 25% chance each child will be affected, a 50% chance to be a carrier, and a 25% chance to be normal. So the description that fits best is having one normal allele and one sickle allele with no disease but the potential to transmit the abnormal allele to offspring.

Being a carrier for sickle cell anemia means you have one normal allele and one sickle allele, so you are heterozygous. The normal allele typically masks the disease, so you don’t show disease symptoms. But you can pass the sickle cell allele to your children. If the other parent is also a carrier, there’s a 25% chance each child will be affected, a 50% chance to be a carrier, and a 25% chance to be normal. So the description that fits best is having one normal allele and one sickle allele with no disease but the potential to transmit the abnormal allele to offspring.