Talk:Pound Cake and Pumpkin Cake/@comment-26113331-20120114161429/@comment-99.255.255.144-20120128233316

Which can and does happen... Fairly often. As a biology student, I must say, it is possible, hypothetically, for two earth ponies to give birth to a pegasus and unicorn, so long as the gene is somewhere in the family.

In my family, for example, my father has black hair and my mother has brown. All of the children, except one, have brown hair. The other has blonde. Just because the parents do not express the trait does not mean it won't be expressed in the offspring. So long as the trait occurred anywhere in the family, and it continues to be carried, if not expressed, it can appear in the offspring. Obviously, the chances of it occurring become increasingly more scarce as each generation brings different genes into the family, but there is still a chance. Imagine a square, divided equally into 4. This is known as a test cross, which shows possible offspring genetics with given dominant and recessive traits, either homozygous (the same) or heterozygous (different or carriers). If the pegasus and unicorn traits are carried, there is a chance for them to be expressed.

TL;DR, So long as Mr Cake's relatives are in fact unicorns and pegasi, the gene could be passed on, regardless of the parent's race.