Fertilization: Beginning of a New Life
What is Fertilization
Fertilization is the fusion of the materials of the nuclei of two gametes that gives rise to the formation of a zygote, the embryo.
Conjugation is a type of fertilization that can occur in bacteria, algae, and other lower organisms that reproduce by transferring or exchanging genetic material between two cells, or by fusing them into one.
The union of gametes
In most superior forms, reproduction is the result of the union of two distinct gametes, one male and one female.
The female gamete, called an egg or egg, is relatively large and contains a reserve of nutrients. Male gametes, called sperm, have a very small reserve of nutrients.
Gametes are haploid, that is, they have only half the number of chromosomes in a diploid cell, which, unlike haploids, have paired chromosomes. The zygote is the result of the union of two haploid cells (female gamete + male gamete) which, once joined, become diploid.