It is sex or gem cell that takes part in fertilization.
There are two types of gametes, male and female.
A gamete has haploid or 1n chromosome number.
Gamete is the last cell of its generation.
It is a product of fertilization.
Zygote is of one type.
Zygote has diploid or 2n chromosome number.
It carries characteristics of both the parents.
It is the first cell of new generation.