In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?
Only round seeds with green cotyledons
Only wrinkled seeds with yellow cotyledons
Only wrinkled seeds with green cotyledons
Round seeds with yellow cotyledons and wrinkled [green/yellow etc.]
, this describes a dihybrid cross. The parent plants are homozygous dominant (RRYY - Round Yellow) and homozygous recessive (rryy - Wrinkled Green). The F1 generation is entirely heterozygous (RrYy) and phenotypically Round Yellow. When F1 plants are self-pollinated, the F2 generation exhibits four phenotypes: Round Yellow, Round Green, Wrinkled Yellow, and Wrinkled Green, in the ratio of 9:3:3:1 . Options 1, 2, and 3 are incorrect because the F2 generation is not restricted to a single phenotype. Option 4, though truncated in the input, represents the mixed phenotypic outcome.
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