Pea plant with double hybrid yellow round seeds (YyRr) is crossed with plant having single hybrid green round seeds (yyRr). The progeny shall be?

2 : 2 : 1 : 1

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1 : 1 : 1 : 1

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9 : 3 : 3 : 1

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3 : 1 : 3 : 1

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Solution

The correct option is D $3 : 1 : 3 : 1$
Pea plant with yellow round seeds (YyRr) will produce 4 types of gametes, YR, Yr, yR, and yr. Pea plant with green round seeds (yyRr) will produce 2 types of gametes, yR, and yr. When these plants are crossed, they will produce 4 types of progeny with yellow round seeds (YyRr, YyRR), Yellow wrinkled seeds (Yyrr), green round seeds (yyRr, yyRR) and green wrinkled seeds (yyrr) in the ratio of 3:1:3:1.
Thus, the correct answer is '3:1:3:1.'

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