<span>A gamete is a male or female sex cell. For example, in animals a male gamete is known as a sperm cell and a female gamete is known as an egg or ovum. The fusion of two gametes allows the production of a new living organism and this process is known as fertilisation. </span>
<span>Gametes are haploid cells that fuses with another haploid cell during fertilization. For human being, the gametes are the egg cells and the sperm cells and human fertilization is the union of a human egg and sperm, which usually occur in the ampulla of the fallopian tube. </span>
The concept of reproductive isolation relates more toward genetic similarities to distinguish between species. The barriers prevent closely related species living in the same geographical area from interbreeding. They help to keep each species distinct from the others.
