Many genetic disorders can be traced to recessive genes.What results from a single dominant gene?

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Huntington's disease is an example of a disorder that results from a single dominant gene. Unlike recessive genetic disorders, which require two copies of the recessive gene (one from each parent) to manifest the disorder, a dominant genetic disorder can occur when just one copy of the mutant gene is present.

Many Genetic Disorders Can Be Traced to Recessive Genes