Leukistic turkey twins?

Is it more likely that two wild leukistic turkeys have hatched from two separate eggs, or from a single egg as twins? Last year I "harvested" (hunted) the male of the pair and have him taxidermied and in my home. His, assuming sister, female counterpart, also leukistic and with a beard (she's definitely a Hen) popped back up on hunting cams in the last few weeks. My question is this:

****Is it more likely that a male and female leukistic pair of sibling turkeys hatched from two separate eggs or are twins from the same egg?

Im thinking that if they are twins, that would explain why both are leukistic and would guarantee the chances of both being leukistic. I believe that if they are not twins, the chances of two leukistic turkeys being born in separate eggs would be astronomically low. But so would the chance of them being twins. So, please help me figure this out.

NOTE: the two turkeys almost look albino with how leukistic they are. The male that I have mounted in my home has one cubic centimeter of brown on the end of a feather. The female seems to be identical but we have not been able to see her "brown spot" due to trail camera footage being our only photo evidence. And yes, I am 100% sure she is a female.