Your Punnett square contains one YY, two Yy and one yy, so your genotypic ratio is 1 : 2 : 1. If Y is dominant and y is recessive, there are only two phenotypes because YY and Yy have the same phenotype, so your phenotypic ratio is 3 : 1 (the two Yys plus the one YY make 3 of that phenotype).
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Answer:
Your Punnett square contains one YY, two Yy and one yy, so your genotypic ratio is 1 : 2 : 1. If Y is dominant and y is recessive, there are only two phenotypes because YY and Yy have the same phenotype, so your phenotypic ratio is 3 : 1 (the two Yys plus the one YY make 3 of that phenotype).
Answer:
Your Punnett square contains one YY, two Yy and one yy, so your genotypic ratio is 1 : 2 : 1