Huntington Disease Is Inherited in Humans as an Autosomal Dominant

question 11

Essay

Huntington disease is inherited in humans as an autosomal dominant gene.Affected individuals show progressive brain deterioration from cell death in the cerebral cortex.Onset of the disease usually occurs between ages 30 and 50.Give two possible reasons for the observed variation in the age of onset of this disease.

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Definitions:

Modify Schema

The process of adjusting or changing one's framework of knowledge to incorporate new information.

Ethnic Groups

Groups of people who identify with each other based on shared cultural characteristics, ancestry, or historical past.

Cultural Heritage

The legacy of physical artifacts and intangible attributes of a group or society inherited from past generations, preserved in the present, and bestowed for the benefit of future generations.

Phallic Stage

A phase in Freudian psychosexual development, occurring roughly between the ages of three and six, where the libido's focus is on the genital area.