What is the ratio of RRYY, rrYY, RrYy and RrYY in F₂ progeny of Mendel’s dihybrid ratio?

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1 : 1 : 2 : 1

1 : 1 : 4 : 2

1 : 1 : 1 : 1

2 : 4 : 1 : 1

answer is B.

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Detailed Solution

Mendel’s dihybrid ratio of F₂progeny is
$RRYY RRYy RRyy RrYY RrYy Rryy rrYY rrYy rryy 1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1$
So,
$RRYY rrYY RrYy RrYY 1 : 1 : 4 : 2$

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