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NEETZoologyPrinciples of Inheritance and Variation

Match List I with List II. List I List II (A) Failure of cytokinesis after telophase (I) Trisomy (B) Failure of segregation of chromatids (II) Monosomy (C) Gain of an extra copy of chromosome 21 (III) Polyploidy (D) Loss of an X chromosome in human females (IV) Aneuploidy Choose the correct answer from the options given below:

Options

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

Correct answer

B. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Step-by-step solution

Failure of cytokinesis after the telophase stage of cell division results in an increase in a whole set of chromosomes, a phenomenon known as polyploidy. Hence, (A) matches with (III). Failure of segregation of chromatids during the cell division cycle results in the gain or loss of a chromosome(s), which is called aneuploidy. Hence, (B) matches with (IV). Gain of an extra copy of chromosome 21 leads to Down's syndrome, which is a type of trisomy. Hence, (C) matches with (I). Loss of an X chromosome in human female

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