In this article we will discuss about the paracentric inversion in chromosome. Chromosome Pairing and Crossing Over: In paracentric inversions chromosome pairing occurs by loop formation in the inverted region; the centromere remains outside the loop. Crossing over in the loop causes the formation of dicentric chromatids which produce bridges at anaphase. Chromatid bridges may be formed at AI or [...]
In this article we will discuss about the inversions in natural populations which is caused when the genes in a section of a chromosome is reversed. Inversions occur spontaneously in a large number of plant and animal species. But the most extensive work has been done in Drosophila in which they have been detected in a rather high frequency. In [...]
In this article we will discuss about the inversions in humans which occurs when the genes in a section of a chromosome is reversed. Pericentric Inversion: There are a number of reports of pericentric inversions in human. Breaks occur in both, short (p) and long (q) arms of the chromosomes. The length of inverted segment can be precisely identified by [...]