Definition
Fertilisation is the process by which the nucleus of male gamete fuses with the nucleus of the female gamete to produce a zygote #BiologyDefinitions
| Step | Image |
|---|---|
| 1. Only 1 sperm nucleus → enters egg. - sperm nucleus fuses with egg nucleus → and fertilised egg or zygote is formed. - this process is known as fertilisation |  |
| 2. As soon as sperm has entered egg → no other sperm can enter. - remaining sperm, which do not fertilise egg → eventually die |  |
Further Complex Explanation
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in oviduct → acrosome of sperm releases enzyme to break down corona radiate (layer of follicle cells surrounding the eggs)
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follicle cells are dispersed
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only 1 sperm enters the egg. membrane of egg changes so that no other sperm can enter
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haploid sperm nucleus fuses with haploid egg nucleus
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diploid zygote (fertilised egg) formed
