Gregor Mendel called the generation created by crossbreeding the parental generation the

(A) second parental generation.

(B) cross filial generation.

(C) second filial generation

(D) first filial generation.

First filial generation.

Explanation:

Mendel is known as the father of genetics. He formulated the law of segregation and law of independent assortment by working on the pea plant.

The Mendel first crossed the pure breed line parents and obtained the first filial generation. The F1 generation is obtained by the cross breeding of the parental generation.

Thus, the correct answer is option (D).