“Reproduction depends on the union of male and female gametes (reproductive, or germ, cells) each with a half set of chromosomes, to form a new individual with a full, unique set of chromosomes.”
Human Physiology: From Cells to Systems 2nd Cd Ed,Sherwood, Kell & Ward, 2013, 2010, Nelson Education Ltd. 709
See more quotes saying life begins at conception here.
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