1: Fertilisation
The process of fusion of male and female gamete that gives rise to unicellular zygote is called fertilization
2: Types of fertilisation
Based on where the fertilisation occurs, it can be classified into two types -
a. Internal fertilisation -
fusion of male and female gametes occurs within the body. Example - human
b. External fertilisation -
fusion of male and female gametes occurs outside the body. Example- frog
3: Fertilisation in Human
In human beings, the male gamete (sperms) is transferred to the female reproductive system. The sperm fuses with the ovum at the ampulla in the fallopian tube of the human female reproductive system. Thus fertilisation in humans is internal .