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NEET UG BIOLOGY MCQ: PRINCIPLE OF INHERITANCE AND VARIATION

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In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2{\mathrm{F}_2}- generation of the cross RRYY×rryy?\mathrm{RRYY} \times \mathrm{rryy}?
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Correct option: D
Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons
Option D (Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons) is correct because the F1 generation will be RrYy (round, yellow). Selfing the F1 will produce round yellow, round green, wrinkled yellow, and wrinkled green phenotypes. The question asks what phenotypes are expected, not the ratio.

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