Vitamin-D Resistant Rickets Is a Sex-Linked Dominant Trait, Which Leads

question 15

Multiple Choice

Vitamin-D resistant rickets is a sex-linked dominant trait, which leads to softening of the bones, which can cause fractures and deformities. Rickets is often due to a deficiency of vitamin D; however, with vitamin- D resistant rickets, ingestion of vitamin D is ineffective. Maria's mother is normal and does not display any symptoms of this disease. Maria's father, however, has the disease. Maria marries a man that does not have the disease. What is the probability that they will have a son that has the disease?

• A) 0%
• B) 25%
• C) 50%
• D) 75%
• E) 100%

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Definitions:

Heights

Varied elevations or tall areas which can induce a fear known as acrophobia in individuals.

Anxiety

A feeling of worry, nervousness, or unease, often about an imminent event or something with an uncertain outcome.

Obsession

A persistent, unwanted thought, idea, or image that an individual cannot control, causing significant anxiety or distress.

Climbing

The physical activity of ascending inclined structures or natural terrain using one's hands, feet, or other body parts for support and movement.