Use the following to answer questions : Suppose members of a true-breeding strain of salamanders with yellow stripes are crossed with a true-breeding strain with red stripes.Red and yellow are two alleles of the same gene.The resulting offspring have both yellow stripes and red stripes. -What pattern would you expect in the F₂ generation? A) Half will have yellow stripes,and half will have red stripes. B) Half will have both yellow and red stripes,one-quarter will have just yellow stripes,and one-quarter will have just red stripes. C) One-third will have both yellow and red stripes,one-third will have just yellow stripes,and one-third will have just red stripes. D) Half will have both yellow and red stripes,and half will be stripeless. E) One-quarter will have both yellow and red stripes,half will have just yellow stripes,and one-quarter will have just red stripes.

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This scenario represents incomplete dominance, where neither allele is completely dominant over the other. Therefore, in the F1 generation, all offspring will have both yellow and red stripes. When these F1 individuals mate with each other, there will be a 1:2:1 ratio of offspring with both yellow and red stripes, just yellow stripes, and just red stripes. This results in half having both yellow and red stripes, one-quarter having just yellow stripes, and one-quarter having just red stripes.

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