Question

Epistasis in Mice Fur In mice, the agouti fur pattern results in individual hairs having a light band of pigment on an otherwise dark hair shaft. The hairs in a solid fur pattern has pigment spread over the entire hair. • Agouti (A) is dominant to solid (a) patterning A completely separate gene can result in either a dominant black (B) pigment added in either pattern or a recessive brown (b) pigment. A third allele at the "agouti" gene ($A^Y$) is dominant to both the A and a alleles. • A homozygous genotype ($A^YA^Y$) results in embryo lethality. • A heterozygous genotype ($A^YA$ or $A^Ya$) will result in yellow fur color - regardless of which alleles are present at the "pigment" gene. In a mating of mice with the following genotypes, what is the probability that a living offspring will have yellow fur? • $A^YaBb$ x $A^YaBb$ Express your answer as a fraction using the slash symbol and no spaces (for example: 1/32).

          Epistasis in Mice Fur
In mice, the agouti fur pattern results in individual hairs having a light band of
pigment on an otherwise dark hair shaft. The hairs in a solid fur pattern has
pigment spread over the entire hair.
• Agouti (A) is dominant to solid (a) patterning
A completely separate gene can result in either a dominant black (B) pigment added
in either pattern or a recessive brown (b) pigment.
A third allele at the "agouti" gene ($A^Y$) is dominant to both the A and a alleles.
• A homozygous genotype ($A^YA^Y$) results in embryo lethality.
• A heterozygous genotype ($A^YA$ or $A^Ya$) will result in yellow fur color -
regardless of which alleles are present at the "pigment" gene.
In a mating of mice with the following genotypes, what is the probability that
a living offspring will have yellow fur?
• $A^YaBb$ x $A^YaBb$
Express your answer as a fraction using the slash symbol and no spaces (for
example: 1/32).

$Epistasis in Mice Fur In mice, the agouti fur pattern results in individual hairs having a light band of pigment on an otherwise dark hair shaft. The hairs in a solid fur pattern has pigment spread over the entire hair. • Agouti (A) is dominant to solid (a) patterning A completely separate gene can result in either a dominant black (B) pigment added in either pattern or a recessive brown (b) pigment. A third allele at the "agouti" gene (A^Y) is dominant to both the A and a alleles. • A homozygous genotype (A^YA^Y) results in embryo lethality. • A heterozygous genotype (A^YA or A^Ya) will result in yellow fur color - regardless of which alleles are present at the "pigment" gene. In a mating of mice with the following genotypes, what is the probability that a living offspring will have yellow fur? • A^YaBb x A^YaBb Express your answer as a fraction using the slash symbol and no spaces (for example: 1/32).$

Added by Amber P.

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