When a crossover occurs within the inversion loop of a pericentric inversion,each recombinant chromatid will have
A) two centromeres.
B) a duplication of one region.
C) translocation.
D) no centromeres.
E) exactly the same length as before the inversion.

Question

Quizplus · Accepted Answer

When a crossover occurs within the inversion loop of a pericentric inversion, each recombinant chromatid will have a duplication of one region because the two interchanged chromatids have different regions. This results in a change in the relative order of the chromosome segments located between the breakpoints, causing duplication and deletion of the segments. The centromere remains intact, but its position may be altered within the inverted segment. Therefore, option A, C, and D are incorrect. The length is also altered due to the duplication and deletion of segments, so option E is incorrect.

When a Crossover Occurs Within the Inversion Loop of a Pericentric