Suppose you are a genetics counselor who is working with a 21-year-old pregnant woman who has just discovered that her father has Huntington's chorea, a rare dominant autosomal trait.This disease usually develops in middle age, so people carrying this trait do not find out they have this genetic disorder until midlife.What is the chance that she has Huntington's chorea?
A) 10%
B) 25%
C) 50%
D) 75%
E) 100%

Question

Quizplus · Accepted Answer

Huntington's chorea is a dominant autosomal trait, which means that an individual who inherits the gene from one parent will have the disease. Since the woman's father has Huntington's chorea, there is a 50% chance that he passed the gene to his daughter. However, genetic counseling is recommended for further testing and information.

Suppose You Are a Genetics Counselor Who Is Working with a 21-Year-Old