Principle of Inheritance and VariationHard

Question

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 generation of the cross RRYYrryy?

Options

A.Only round seeds with green cotyledons
B.Only wrinkled with green yellow cotyledons
C.Only round seeds with green cotyledons
D.Round with green yellow cotyledons and wrinkled with green yellow cotyledons

Solution

When a cross (dihybrid) is made between plants bearing round yellqw (RRYY) and wrinkled green (rryy) seeds, all the plants in F1 generation are with yellow round seeds (showing the genotyp RrYy). The phenotpe in F2 will be as folloes :

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