Even een gekopieerd stukje:
There are several different genes that cause albinism in the species in which it exists. We say it does not exist in horses because have never found a horse that meets the criteria to be considered an albino, not because it is impossible in one species while possible in another. In my understanding, even the experts don’t know why it doesn’t exist in horses. Its existence has just never been proven.
Albinism is created when an offspring receives two recessive genes from its parents... one from each parent. The parents do not exhibit any signs of albinism... a recessive gene is completely masked or “overpowered” by the dominant gene in the pair. So the parent carries the gene without being albino. The different types of albinism all affect pigmentation, and also carry with them some other genetic problems including eye problems, blood clotting problems, and hearing problems.
Het is gewoon nooit aangetoond in een paard dat het voorkomt, dus bestaat het niet (tot het tegendeel bewezen is).