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There is a color pattern inherited in certain mice in which agouti (gray) is homozygous, and yellow is heterozygous. A cross of two yellows produces two yellows for each agouti. A second gene, C/c , controls the expression of the color genes: C is the dominant allele that allows color to be expressed, and the recessive gene in the homozygous condition ( cc ) prevents any color from being expressed.
(a) Give the genotypes of a white parent crossed with a yellow parent that produces 1/2 white, 1/3 yellow, 1/6 agouti offspring.
(b) Give the results of the cross of two forms heterozygous for each gene.
(c) Can you develop a pure-breed population for any of the colors?
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