Question

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

• A. Round yellow seeds
• B. Wrinkled green seeds
• C. Wrinkled yellow seeds
• D. Round green seeds

Answer 1

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.