- The adult male and female gametes are formed by meiosis.
- When we have sufficient cells this will then be called an embryo.
- The cells that are formed by meiosis have half as many chromosomes as the cell that formed them.
- Fertilisation occurs when a male and female gamete join.
- The zygote divides into a ball of cells, called the blastula which then grows to form the embryo.
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Fertilization is the fusion of gametes to produce a new organism. In animals, the process involves the fusion of an egg by a sperm, which ultimately leads to the development of a fetus.
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