In watermelons, bitter fruit (B) is dominant over sweet fruit (b), and yellow spots (S) are dominant over no spots (s). The genes for these two characteristics assort independently. A homozygous plant that has bitter fruit and yellow spots is crossed with a homozygous plant that has sweet fruit and no spots. The F1 are crossed to produce the F2.
(A) What are the phenotypes with corresponding phenotypic ratios of the F2?
(B) If an F1 plant is backcrossed to the bitter, yellow-spotted parent, what phenotypes and proportions are expected in the offspring?
(C) If an F1 plant is backcrossed to the sweet, non-spotted parent, what phenotypes and proportions are expected in the offspring?
(D) If you testcross the F1 plant, what phenotypes and proportions are expected in the offspring?
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