Zoology 10th Edition by Stephen Miller,John Harley

Exercise 13

Mitotic cell division is the means by which animal cells reproduce themselves during embryonic development, growth, and repair. Mitotic (nuclear) and cytoplasmic divisions of a parent cell produce two daughter cells that are genetically identical to the parental cells.
Why is mitotic cell division of a diploid cell useful for growth and repair processes but not useful in the production of egg and sperm cells?