Sickle Cell Anemia Is a Recessive Trait in Humans

question 30

Multiple Choice

Sickle cell anemia is a recessive trait in humans.In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will have the normal phenotype?

• A)1/4
• B)1/2
• C)none
• D)1/8
• E)1/16 will be albino

---

Definitions:

Posttraumatic Stress Disorder

A psychiatric disorder that may occur in people who have experienced or witnessed a traumatic event, characterized by severe ongoing emotional distress.

Surviving

The act of continuing to live or exist, especially in spite of challenging conditions or circumstances.

Hurricane

A powerful tropical storm with heavy rain and high winds that form over warm ocean waters and can cause significant damage to coastal areas.

Agoraphobia

An anxiety disorder characterized by an intense fear of places or situations where escape might be difficult or help might not be available, leading to avoidance behaviors.