<< I'm no science wiz or anything but if i remember biology correctly, don't you need an X and a Y chromosone to produce a child? >>
No, you need an X and Y chromosome to produce a male child.
X+Y = male
X+X = female
Y+X+X = female, but more muscular
Y+Y+X = male
Y+Y = the embryo dies in the womb
Of course, this counts only for Humans and many (thus not all) other animals.