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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 father's genetic contribution determines the sex of the baby. Women have XX chromosomes, men have XY (this is part of the definition of female and male). The male provides â¦ either X or Y to the woman's X. So if the man donates an X, the baby is XX and thus female.If he donates a Y, the baby is XY and thus male.n humans, it is the sperm which determines the sex of the child. The presence of a Y chromosome in the zygote is what determines that the child will be male. Only the fathe â¦ r has a Y chromosome (XY).