A religious cult called the Fundamental Church of Latter Day Saints lives predom

Question

A religious cult called the Fundamental Church of Latter Day Saints lives predominantly in the United States and Canada. The cult practices an illegal form of polygamy where one man can have over 60 wives. Most teenage boys are forced to leave the cult because they are unwanted competition for wives, so there are few men fathering children in the population. The members of this cult have the world's highest incidence of fumarase deficiency, an extremely rare genetic condition. Which two evolutionary processes provide an explanation for this genetic distinctiveness?

Explanation / Answer

Inbreeding between close relatives increases the level of homozygotes for autosomal genetic disorders and leads to decreased biological fitness. This is known as inbreeding depression.

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