Question

Usually gametes are haploid or diploid

Answer 1

In humans, n = 23. Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells. Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.

Answer 2

After fertilisation the gamete formed have a diploid set of chromosomes because the gamete has received haploid sets sets from both father and mother. Hence, the gamete is diploid.