Question

The number of gametes formed by a F${}_1$ hybrid in a dihybrid cross is

• A. Four
• B. Two
• C. One
• D. Six

Answer 1

The correct option is A Four

In the F${}_1$ hybrid of a dihybrid cross, the genotype of the hybrid will be RrYy. When the selfing of this hybrid is performed, the hybrid will produce four gametes, RY, rY, Ry and ry. These gametes fuse with the gametes of the other hybrid of this generation to produce the offspring in the F${}_2$ generation.

Thus, the correct answer is option A.