Egg and sperm fertilization process
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At the beginning of the process, the sperm undergoes a series of changes, as freshly ejaculated sperm is unable or poorly able to fertilize. the enzymatic penetration of the egg's tough membrane, the zona.
Read and learn for free about the following article: Egg meets sperm. by the cellular division process known as meiosis, which creates 4 sperm from a single cell membrane, and will help make sure that only one sperm can fertilize the egg.
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Description:Transformations[ edit ] In preparation for the fusion of their genetic material both the oocyte and the sperm undergo transformations as a reaction to the fusion of cell membranes. The oocyte completes its second meiotic division. This results in a mature ovum. The nucleus of the oocyte is called a pronucleus in this process, to distinguish it from the nuclei that are the result of fertilization. The sperm's tail and mitochondria degenerate with the formation of the male pronucleus. This is why all mitochondria in humans are of maternal origin.
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