The ratio obtained in the F2 generation for a dihybrid cross between round yellow seeds and green wrinkled seeds is ____.
A
9:5:5:3
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B
9:3:4:3
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C
9:3:3:3
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D
9:3:3:1
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Solution
The correct option is D 9:3:3:1 ∙ In Mendel's dihybrid cross, the parents were - pea plants with yellow coloured round seeds (RRYY) and green coloured wrinkled seeds (rryy). Hence, the F1 progeny obtained had round and yellow seeds (RrYy).
∙ Selfing of the F1 plants gave F2 progenies exhibiting 4 different phenotypes: Round yellow (9), wrinkled yellow (3), round green (3), and wrinkled green seeded plants (1). Hence, the ratio obtained is 9:3:3:1.