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What best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders?

In: Genetics [Edit categories]

Answer:

If a dominant allele is lethal then every individual who has one copy of this allele will die. This means that these individuals are extremely unlikely to reproduce.

However, if the disorder is caused by a recessive allele, a person needs two copies. This means that people with one copy can still reproduce, and so the gene is more frequent than the dominant lethal gene.

First answer by 1Jazz. Last edit by 1Jazz. Contributor trust: 39 [recommend contributor ]. Question popularity: 0 [recommend question].

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What best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders?

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