Question

The order of genes present in a chromosome is as follows. 

Which rearrangement represents a paracentric inversion? 

• A. A
• B. B
• C. C
• D. D

Hint:

Check whether the centromere is included: if yes → pericentric; if no → paracentric.

Answer 1

The Correct Option is B

A paracentric inversion means the inverted segment does not involve the centromere.
Original order: L–M–(centromere)–N–O–P–Q.
Option (B) inverts the N–O–P segment to N–P–O, which lies completely on one side of the centromere.
Hence, (B) represents a true paracentric inversion.