Question

During a dihybrid cross with contrasting characters in the F₂ generation, parental genotypes will appear in ______.

Options

• 1/16

• 2/16

• 3/16

• 9/16

Answer 1

During a dihybrid cross with contrasting characters in the F₂ generation, parental genotypes will appear in 2/16.

Explanation:

A dihybrid cross occurs when a plant with a yellow colour round (YYRR) seed crosses with a plant with green colour wrinkled seeds (yyrr). Plants with yellow round seeds (YyRr) are generated in the F₁ generation. When the F₁ plant is self-pollinated in F₂ generations, 1yyRR, 2yyRR, 2YYRr, 2YyRR, 4YyRr, 1YYrr, 2Yyrr, 1yyRR, 1yyRR, 1yyRR. As a result, option 2/16 is right.