Question

$F_1$ progeny of Mendelian dihybrid cross produces?

• A. Two types of pollen grains
• B. Four genotypes of gametes
• C. Two types of eggs
• D. Four types of pollens only

Answer 1

The correct option is B Four genotypes of gametes

Dihybrid cross is a cross between 2 different genes that differ in 2 different traits. When a cross is made between homozygous dominant (AABB) and recessive (aabb) parents, the F${}_1$ progeny will be heterozygous dominant (AaBb). This F${}_1$ progeny of Mendelian dihybrid cross produces 4 types of gametes, namely AB, Ab, aB and ab. The progeny of F${}_2$ generation will produce four types of phenotype and the ratio will be 9:3:3:1.

Thus, the correct answer is 'Four genotypes of gametes.'