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ZoologyNEET 2024Sex determination, mutation, genetic disorders

Principles of Inheritance and Variation

Match List I with List II.

List I List II
A. Down's syndrome I. 11th chromosome
B.βB. \beta-Thalassemia II. X chromosome
C.αC. \alpha-Thalassemia III. 21st chromosome
D. Klinefelter's syndrome IV. 16th chromosome

Choose the correct answer from the options given below:

  1. A.A-II, B-III, C-IV, D-I
  2. B.A-III, B-IV, C-I, D-II✓
  3. C.A-IV, B-I, C-II, D-III
  4. D.A-I, B-II, C-III, D-IV

Solution

Down's syndrome is trisomy 21 (III). The β\beta-globin gene is on chromosome 11 (I) and the α\alpha-globin genes on chromosome 16 (IV). Klinefelter's syndrome involves an extra X chromosome (II).

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