NEET Botany Molecular Basis of Inheritance Questions Solved

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

(1) Deletion

(2) Duplication

(3) Inversion

(4) Reciprocal translocation

(3) 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 D E F inverted. The new arrangement will be A B C F E D G H I. It is a chromosome aberration entailing twp breaks in a chromosome followed by a reversal of the segment and consequently of the gene sequence in the segment. Pericentric inversion includes the centromere in the inverted segment, whereas paracentric inversions do not.

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