In hogs a gene that produces a white belt around the
animal's body is dominant over its allele for a uniform
body. Another independent dominant gene produces fusion of
the hoof (syndactyly). Suppose a uniformly colored hog
homozygous for syndactyly is mated with a normal footed hog
homozygous for the belted character. What would be the
phenotype of the F1? If the F1's interbreed, what would be
the phenotypic ratio of the F2?
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Answer Posted / Pankaj Kumar Sinha
The F1 (first generation) offspring will have a white belt around their body and normal feet because both dominant traits are passed on from each parent. This is known as codominance.n If the F1's interbreed, the F2 (second generation) offspring will exhibit four possible phenotypes: uniform color with normal feet (BbSySy), white belt with normal feet (BBSySy), uniform color with syndactyly (BbsySy), and white belt with syndactyly (BBsySy). The expected phenotypic ratio of the F2 is 1:2:1:0, where each pair of ratios represents the number of offspring with normal feet and the specific coat color.
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