Question

Name the two types of mammalian gametes. How are these different from each other? Name the type of reproduction they are involved in. Write the advantage of this type of reproduction. 

Answer 1

The two types of mammalian gametes are the sperm (male gamete) and the egg (female gamete).

The sperm and the egg are structurally as well as genetically different from each other. The sperms are motile, while the egg is non-motile. The chromosomes possessed by the two gametes are also different. The sperms have two types of sex chromosomes, i.e. X and Y, while in eggs, both sex chromosomes are of X type only.

These gametes are involved in the sexual reproduction.

The advantages of sexual reproduction are as follows:
(1) It is a source of genetic variation among organisms of a population, and, thus, helps in evolution of species.
(2) It gives rise to individuals more adapted to the environment