Difference between Paracentric and Pericentric Inversion

Inversions are rearrangements in chromosomes where small segments break, rotate about 180° and reattach themselves. There are two types of inversions – Paracentric and Pericentric. Let us look at their differences:

Paracentric Inversion

Pericentric Inversion

Definition

This is a type of inversion in which the centromere is not involved.

This is a type of inversion which involves the centromere.

Occurrence

It occurs in only one arm.

It occurs in both the arms.

Arrangement

The broken segment always arranges itself in the reverse direction.

There is no hard and fast rule for the arrangement of broken segments.

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