Autosomal dominant diseases are exhibited by anyone who carries at least one dominant allele for that gene.How is it that dominant lethal genes,such as the one that causes Huntington disease,can persist in a population?

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Dominant lethal genes that cause diseases such as Huntington's disease usually take effect later in life after people have had children. This means that affected individuals may have already passed on the disease-carrying allele to their offspring before they even know that they have the disease. Additionally, some individuals may have a new mutation that causes the disease and may not have a family history of the condition. Therefore, the disease-causing allele can persist in the population.

Autosomal Dominant Diseases Are Exhibited by Anyone Who Carries at Least