Quote:
Originally Posted by Tavia
Or can environmental factors during incubation cause the effect as well?
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I once had a snow female that had a red spot and she got a snow son with a red spot to, but all he other snow siblings did not get any red spots.
It is likely that there is some kind of genetic factor involved that increase the likelihood of getting red spots/patches but it is not a predicable with simple recessive or dominant inheritance.
In humans there are families with increased likelihood of getting twins, but there are no simple genes that can explain the trait.
Environmental factors do probably have some influence to.