Question

Sickle cell anaemia is a/an

• A. Autosomal dominant inheritance
• B. X-linked recessive inheritance
• C. Autosomal recessive inheritance
• D. X-linked dominant inheritance

Answer 1

The correct option is C Autosomal recessive inheritance

Sickle cell aneamia is autosomal recessive inheritance. The types of haemoglobin a person makes in the RBC depends on what haemoglobin genes are inherited from his or her parents. If one parent has sickle-cell aneamia (SS) and the other has sickle cell trait then there is a 50% chance of a child's having sickle-cell disease and a 50% chance of a child having sickle-cell trait.