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In the process, the nucleus of an egg is inserted into the cytoplasm of an egg from a donor female which has had its nucleus removed, but still contains the donor female's mtDNA. The composite egg is then fertilized with the male's sperm.
The gamete cells (sex cells) contain 23 chromosome â¦ s per cell. When a sperm cell (with 23 chromosomes from the father), fertilises an egg cell (with 23 chromosomes from the mother), the resulting fertilised egg has 46 chromosomes.