Question: 102: Given below are two statements:
Statement I :
Sickle cell anaemia and Haemophilia are autosomal dominant traits .
Statement II :
Sickle cell anaemia and Haemophilia are disorders of the blood.
In the light of the above statements, choose the correct answer from the options given below :
(1) Both Statement I and Statement II are correct
(2) Both Statement I and Statement II are incorrect
(3) Statement I is correct but Statement II is incorrect
(4) Statement I is incorrect but Statement II is correct
Answer: Option (4)
Explanation:
Sickle cell anaemia is a genetic disorder caused by a mutation in the beta-globin gene of haemoglobin.
It is inherited as an autosomal recessive trait, not an autosomal dominant trait.
Haemophilia is a genetic disorder in which blood does not clot properly due to deficiency of clotting factors.
Haemophilia is inherited as an X-linked recessive trait, not an autosomal dominant trait.
Therefore, Statement I is incorrect because neither sickle cell anaemia nor haemophilia is an autosomal dominant disorder.
Both sickle cell anaemia and haemophilia affect blood components such as haemoglobin and clotting factors.
Hence, both are classified as disorders of the blood.
Therefore, Statement II is correct.
Thus, the correct answer is Option (4).