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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.
A sperm cell is the male sex cell. All animals (and many other types of organisms) produce what are called sex cells. Sex cells, are the cells, that when combined, produce a completely new organism. For example, your mother and every other human female, carry egg cells (female sex cells) in their ovaries.emember, we said that DNA is like a recipe book that contains all of the information that makes the organism who and what it is. Half of the biological information contained in the DNA is packaged in each of the male's sperm cells. The egg cell is packaged in a very similar manner.