Question

A person has a recessive allele for a disease but the allele is masked by the presence of a normal dominant allele in the person. This person

A. is homozygous for the disease.
B. cannot produce gametes.
C. is termed a carrier.
D. is termed a linkage group.
E. has the disease but cannot pass this disease to their offspring.

Answer 1

C. is termed a carrier.The person with a recessive allele for a disease and a normal dominant allele is termed a carrier (C). They do not exhibit disease symptoms but can pass the recessive allele to their offspring,

Step-by-step explanation:

If a person has a recessive allele for a disease but also has a normal dominant allele, this individual does not exhibit the disease symptoms. Instead, the person is termed a carrier of the disease. Being a carrier means that while they have one copy of the allele that causes the disorder, the dominant allele masks the recessive allele's effects, so they do not display the symptoms of the disease. Carriers can pass the recessive allele to their offspring, who may exhibit the disease if they inherit another recessive allele from the other parent.

The correct answer to the question is that the person C. is termed a carrier. Carriers have a heterozygous genotype, consisting of one dominant and one recessive allele (Aa), where the dominant allele (A) masks the expression of the recessive allele (a). It is important to note that these individuals can contribute the recessive allele to their children, and if both parents are carriers, there is a 25% chance that a child will be homozygous recessive (aa) and exhibit the disease.