Making babies involves a male and female. So it may be
surprising to learn that thousands of animal species manage without
males: their eggs develop without fertilization. They practice
parthenogenesis, literally virgin birth. In most animals (and
plants), adults have two sets of chromosomes – one each from father
and mother. In making sperm or egg cells, special cell
division halves the …
If you have a valid subscription to Thirdway, please
log inlog in to view this content. If you require a subscription, please
click here.