A Couple Is Planning to Have a Child

question 18

Multiple Choice

A couple is planning to have a child. The female is a carrier for hemophilia; the male does not have hemophilia. What is the chance that a female child will never develop hemophilia?

• A) 0%
• B) 25%
• C) 33%
• D) 50%
• E) 100%

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Definitions:

Aortic Semilunar Valve

A valve in the heart located between the left ventricle and the aorta that prevents blood from flowing back into the heart.

Mitral Valve

A valve in the heart that lets blood flow from the left atrium to the left ventricle, preventing backflow.

Tricuspid Valve

Valve closing the orifice between the right atrium and the right ventricle of the heart.

Pulmonary Semilunar Valve

A valve in the heart located between the right ventricle and the pulmonary artery, preventing backflow of blood into the heart.