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12 March, 19:44

A cross between two squash plants that produce yellow squash results in 124 offspring: 93 produce yellow squash and 31 produce green squash. What are the likely genotypes of the plants that were crossed? A. one YY, one Yy B. both yy C. both YY D. both Yy

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  1. 12 March, 19:48
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    The genotypes of the plants that were crossed must both have been Yy. A cross between two Yy parents would result in approximately 1/2 Yy offspring, 1/4 YY offspring, and 1/4 yy offspring. Of those offspring, approximately 3/4 (YY and Yy) would express the dominant phenotype. The other 1/4 (yy) would express the recessive phenotype (yy). This is consistent with the results given for the cross. D: Both Yy
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