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NEET 2016 Phase 2 · BiologyPrevious Year Question

The mechanism that causes a gene to move from one linkage group to another is called

Answer: (C) Translocation. Answer: (C) Translocation Solution: A linkage group is the set of genes on a single chromosome.

  1. A.Inversion
  2. B.Duplication
  3. C.Translocation✓
  4. D.Crossing-over

Correct Answer

(C) Translocation

Solution & Explanation

Answer: (C) Translocation Solution: A linkage group is the set of genes on a single chromosome. Translocation moves a segment of DNA (with its genes) from one chromosome to a non-homologous chromosome, thereby shifting genes from one linkage group to another. Inversion and duplication act within the same chromosome, and crossing-over exchanges segments between homologues (same linkage groups). NCERT Reference: NCERT Class XII, Ch 4, p.72, lines 10-13: "loss (deletions) or gain (insertion/duplication) of a segment of DNA, result in alteration in chromosomes. Since genes are known to be located on chromosomes, alteration in chromosomes results in abnormalities or aberrations."

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