Suppose there is a unique species of mouse where two genes, c and t, control the

Question

Suppose there is a unique species of mouse where two genes, c and t, control the ovrall fur phenotype. The c gene controls coat color, and the t gene controls stripe thickness. Both genes are X-linked and a region of heterochromatin. The c+ allele produces the wild type brown coat color, and the c allele produces white coat color. The t+ allele produces the wild type narrow stripes, and the t allele produces thick stripes. Four proposed patterns of heterochromatin, indicated as a wavy line, appear below. Match each coat pattern to the expected coat phenotype of the mice.

Which of the patterns would theoretically never be observed?

Explanation / Answer

Based on the given data,

Thus, the genotype that produce Brown coat is:

c+ c+

The genotypes that produce white coat color are:

The

Thus, the genotype that produces narrow stripes is:

t+ t+

The genotypes that produce thick stripes are:

Note: if the genes are present in heterochromatin they cannot express. Therefore,

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