Question

List and briefly describe the ways genomic DNA can be rearranged (there are three of them).

A) Transcriptional rearrangement, translation rearrangement, and replication rearrangement.
B) Chromosomal translocation, inversion, and duplication.
C) Replication rearrangement, transcriptional inversion, and nucleotide excision.
D) Mutational rearrangement, recombination rearrangement, and transcriptional duplication.

Answer 1

Genomic DNA can be rearranged through chromosomal translocation, inversion, and duplication, which can affect gene alignment and potentially result in aneuploid gametes. Option B is correct.

Step-by-step explanation:

The ways in which genomic DNA can be rearranged in chromosomes include:chromosomal translocation, inversion, and duplication. Chromosomal translocation occurs when two segments from different chromosomes change positions with each other. Inversion involves a segment of DNA which is detached, rotated 180°, and then reattached to the same chromosome.

This may occur due to mechanical stress or the action of transposable elements. Duplication refers to the occurrence of a section of a chromosome being copied and therefore present more than once in the genome. These rearrangements can lead to the formation of aneuploid gametes if recombination events misalign genes during meiosis.