In oogamy, fertilization involves :

Options

A. A large non-motile female gamete and a small nonmotile male gamete
B. A large motile female gamete and a small non-motile male gamete
C. A small non-motile female gamete and a large motile male gamete
D. A large non-motile female gamete and a small motile male gamete

Answer

D

Explanation

Fusing gamete are morphologically as well as physiologically different.
Smaller and motile – Male gamete
Larger and non-motile – Female gamete.