In Mendel's dihybrid cross the phenotypic ratio was 9 : 3 : 3 : 1. Here 9 indicates

Round yellow seeds

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Wrinkled green seeds

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Wrinkled yellow seeds

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Round green seeds

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Solution

The correct option is A Round yellow seeds
The cross involving two pairs of contrasting traits is called a dihybrid cross. The two pairs of contrasting traits chosen by Mendel were round/wrinkled shaped and yellow/green coloured seeds. The 9 in the dihybrid ratio represents round and yellow seeds.

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The phenotypic ratio obtained by crossing Mendel’s $F_{1}$ dihybrid with the recessive parent is

The phenotypic dihybrid ratio in F2 generation is ________.

The phenotypic ratio obtained by crossing the F₁ dihybrid with the recessive parent is

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