There are multiple genetic reasons that may cause a horse to be a cropout, though usually it is because some spotting patterns are recessive genes that are not necessarily expressed unless the relevant allele is inherited from both parents.
There are multiple genetic reasons. These multiple genetic reasons may cause a horse to be a cropout, though usually it is because some spotting patterns are recessive genes. Unless the relevant allele is inherited from both parents. This was what these recessive genes are not necessarily expressed.