A is the allele for normal skin color, and a is the allele for albinism. CIS

the allele for normal hemoglobin production, and c is the allele for sickle

cell anemia. E is the allele for normal bone growth, and e is the allele for

dwarfism. Describe the person with the alleles AAccEe.

Normal skin, sickle cell disease, normal bone growth

Explanation:

Normally, dominant alleles are denoted in upper case, and recessive alleles are denoted in lowercase. Dominant alleles are always expressed if they are present, whereas for a recessive allele, 2 copies are required for it to be expressed.

We have a diploid genome., meaning we have two copies of every gene, one inherited from our mother and one from our father. These copies might represent different alleles (versions) of a trait, or they might be the same. If a person has 2 copies of the same allele, they are homozygous, if each copy of a gene has a different allele, they are heterozygous.

This person is homozygous at the A gene, having 2 copies of the normal skin colour. We assume since A is written in capitals that normal skin colour is the dominant trait and albinism is the recessive trait. This person has 2 copies of the normal skin trait so will have normal skin.

The person is homozygous for the c gene, having 2 copies of the sickle cell anaemia allele. There is no dominant allele present to mask the effects of the recessive sickle cell allele, so they will be affected by sickle cell disease.

The person is heterozygous at the E gene, with one copy of the allele for normal bone growth (E) and 1 copy of the allele for dwarfism (e). Again, because E is capital we assume it is a dominant trait, so the individual will have normal bone growth.