Question

Number of pure recombinants obtained in dihybrid $F_2$ generation with homozygous parents, is

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B 2

Dihybrid cross is a cross between two different strains having two different traits. When a cross is made between two pure homozygous parents (AABB x aabb), F${}_1$ generation has all the recombinants (AaBb). When cross is made between F${}_1$ generation, the F${}_2$ generation have 1 pure homozygous dominant (AABB), 2 pure recombinanats (AaBb) and 1 pure homozygous recessive (aabb).

Thus, the correct answer is option B.