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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
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. Autosomal recessive inheritance

Explanation:

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.

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