Question

before you can conduct a blood transfusion to save jamal’s life, you’ll need to review the basics of how genetic information is passed down. let’s see how much you remember. albinism is a genetic disorder that is caused by a lack of melanin production in the skin. the trait that causes the condition is a recessive trait. let’s say a mother who has the albinism condition (aa), is married to a man who does not have the condition (aa). can you use what you know about genetics so far to predict the genotype(s) and phenotype(s) of their offspring? select all of the possible genotypes for the offspring. □ aa □ aa □ aa select all of the possible phenotypes for the offspring. □ does not have albinism □ has albinism

Explanation:

For the genotypes of the offspring:

Step1: Determine parental gametes

The mother has genotype \( aa \), so she can only produce gametes with the \( a \) allele. The father has genotype \( AA \), so he can only produce gametes with the \( A \) allele.

Step2: Use Punnett square (or direct combination)

When we combine the gametes, each offspring will receive one allele from the mother (\( a \)) and one from the father (\( A \)). So the genotype of each offspring is \( Aa \).

Step1: Recall dominance of alleles

Albinism is a recessive trait, meaning the recessive allele (\( a \)) is expressed only in the homozygous recessive (\( aa \)) state. The dominant allele (\( A \)) masks the recessive allele.

Step2: Analyze offspring genotype

The offspring have the genotype \( Aa \) (heterozygous). Since \( A \) is dominant and does not have the albinism - causing recessive phenotype expressed, the offspring will not have albinism.

Answer:

The only possible genotype for the offspring is \( Aa \), so we select the checkbox for \( Aa \).

For the phenotypes of the offspring: