on the sex chromosomes mean that a female, being "XX" in nature, can produce sperm with "XY", "Yy", "X", "Y", "y", or "O" (no sex chromosome). A male, being "XY", can produce sperm with "XY", "Yy", "X", "Y", "y", or "O". A zygote, taking one gamete from each parent is four, two to the four cantins nor any on the town cow cries behind the