Modern creationists, with few exceptions, have not given much attention to modern genetics. Yet the study could be most useful. On the other hand, it reveals many difficulties for evolutionists. Indeed, the subject might better be called, not evolutionary genetics, as is sometimes done, but rather population genetics. In this article much recent work is mentioned. Difficulties are pointed out for both theories commonly proposed from an evolutionary viewpoint: the classical theory and the balance theory. But some points emerge which creationists have come to believe on other grounds, for instance, that many creatures have far more potential for variation than has been suspected until recently. This can be seen to be a provision by the Creator, to allow creatures to cope with changing conditions that might arise.