Consider the following individuals in a-c below. First, write out the genotype o

Question

Consider the following individuals in a-c below. First, write out the genotype of each individual described (define allele symbols) then use a fork-lined diagram to determine all possible gamete types:

a. A female that is heterozygous for an X-linked gene A, homozygous for a mutant allele of gene B on chromosome I and heterozygous for gene C on chromosome II (define your symbols):

b. A female that is heterozygous for two X-linked genes A and B (they are found in the repulsion conformation) and heterozygous for an autosomal gene C.

c. A male that is hemizygous for mutant alleles of genes A and B (both linked to the X chromosome and heterozygous for an autosomal gene C.

Explanation / Answer

a.

Consider “B” is the mutant allele.

b.

c.

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