Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Few genetic disorders are controlled by dominant alleles. A mutant dominant allele is expressed in every individual who inherits even one copy of it. If it causes a serious disorder, affected people may die young and fail to reproduce. Therefore, the mutant dominant allele is likely to die out of the population. Answer: genetic disorders
A:
Dominant alleles rarely cause what type of disorders, since the mutant allele is likely to die out of the population?