First slide

Inheritance of Two Genes

Question

If pea plant produces 2560 seeds in $F_{2}$ generation when a dihybrid cross is done between homozygous Round and Yellow seeded plant and wrinkled and green seeded plant, how many of them have the phenotype wrinkled yellow seeds?

Easy

A

160
B

320
C

480
D

1280

Solution

The phenotypic ratio of $F_{2}$ generation Round Yellow 9 : Round green 3 : wrinkled yellow 3 : wrinkled green 1. Hence the number of wrinkled yellow seeded plants would be $\frac{2560 \times 3}{16} = 480$ .

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