Answer: Anisogamy
Explanation:
Anisogamy can be defined as a type of sexual reproduction during which the fusion of the male and female gamete takes place that are of different shape and different sizes.
The larger gamete is considered to be female and the smaller gamete is considered to be male.
Example is gametes of human beings in which the sperm is of different shape and size and the ova is of different shape and size.