Sickle-Cell Anemia Is Caused by a Recessive Mutation in the Hemoglobin

question 67

Multiple Choice

Sickle-cell anemia is caused by a recessive mutation in the hemoglobin gene. However, heterozygote individuals also show a small percentage of sickled red blood cells. What type of inheritance pattern is this an example of?

• A) Polygenic inheritance
• B) Sex linked
• C) Chromosomal nondisjunction
• D) Incomplete dominance

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