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NEETZoologyPrinciples of Inheritance and Variation

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Thalassemia differs from sickle-cell anaemia as the former is a quantitative problem of synthesising too few globin molecules. Reason (R): Sickle-cell anaemia is a qualitative problem of synthesising an incorrectly functioning globin. In the light of the above statements, choose the correct answer

Options

  1. ABoth Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
  2. BBoth Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  3. CAssertion (A) is true but Reason (R) is false.
  4. DAssertion (A) is false but Reason (R) is true.

Correct answer

A. Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).

Step-by-step solution

Thalassemia and sickle-cell anaemia are both autosomal recessive blood disorders. According to NCERT, Thalassemia differs from sickle-cell anaemia in that the former is a quantitative problem of synthesising too few globin molecules, while the latter is a qualitative problem of synthesising an incorrectly functioning globin. Therefore, both Assertion (A) and Reason (R) are true independent statements. However, Reason (R) describes the nature of sickle-cell anaemia and does not explain why Thalassemia is a quantitat

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