Question

What type of fertilization occurs in hen. explain in brief the development of embryo in hen.

Answer 1

Internal fertilization takes place in hen. The egg is formed inside the female body where it fuses with the male gamete. The male gamete is mobile and has to reach the egg in order to fuse with it.
The single-celled zygote undergoes rapid mitotic divisions into a multicellular structure called blastula. Blastula undergoes differentiation to form embryo.