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Principles Of Inheritance And Variation

Question
CBSEENBI12047028
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Given below is a representation of a kind of chromosomal mutation. What is the kind of mutation represented

  • Deletion

  • Duplication

  • Inversion

  • Reciprocal translocation

Solution

C.

Inversion

During inversion a segment of chromosome gets inverted in the process of reattachment. Thus a chromosome having the genes A B C D E F G H I in linear order may get the segment DEF inverted. The new arrangement will be A B C F E D G H I. It is a chromosome aberration entailing two breaks in a chromosome followed by a reversal of the segment and consequently ofthe gene sequence in the segment. Pericentric inversion includes the centromere in the inverted segment, whereas paracentric inversions do not.

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