155k views
4 votes
The pedigree on the right shows the inheritance pattern for an x-linked recessive disorder. How many individuals are carriers of the disease but are not affected? What is the genotype of the male circled in pink?

1 Answer

5 votes

Final answer:

In the pedigree provided, there are two carriers of the x-linked recessive disorder who are not affected. The male circled in pink has the genotype AY, indicating that he is affected by the disorder.

Step-by-step explanation:

In the pedigree provided, carriers of the x-linked recessive disorder are represented by females who have the genotype Aa. These carriers are not affected by the disease themselves, but they can pass on the disease-causing allele to their offspring. In the pedigree, individuals who are carriers but not affected are indicated in yellow. Therefore, there are two individuals who are carriers but not affected in this pedigree.

The genotype of the male circled in pink can be determined by looking at his parents and their genotypes. If the male's mother is a carrier, she would have the genotype Aa. If the male's father is unaffected, he would have the genotype XY. Since the male offspring inherits one X chromosome from his mother and one Y chromosome from his father, his genotype would be AY, indicating that he is affected by the x-linked recessive disorder.

User Geoff Atkins
by
7.8k points