Choose the true statement about the role of polyploidization in the evolution of plant genomes.
A)Jumping of transposons is most common many generations after a polyploidization event.
B)Genome downsizing following allopolyploidy usually affects the participating hybrids equally.
C)Genome downsizing following allopolyploidy results mainly from duplicate gene loss.
D)Crop plants rarely show evidence of polyploidization events.

Question

Quizplus · Accepted Answer

Genome downsizing following allopolyploidy is usually attributed to duplicate gene loss, which can result in the loss of one or more of the duplicated copies of a gene. This process typically affects one of the subgenomes more than the other, leading to asymmetrical gene loss and contributing to the evolution of new gene functions and regulatory networks. The other statements are incorrect: A is false because transposon activity is often high immediately following polyploidization; B is incorrect because genome downsizing is typically more severe in one of the subgenomes involved in the hybridization event; and D is false because many important crop plants, including wheat and cotton, are polyploid.

Choose the True Statement About the Role of Polyploidization in the Evolution