NEETBotanyCell Cycle and Cell Division
What happens during Metaphase 1 of meiosis?
Options
- AHomologous chromosomes separate.
- BBivalent chromosomes align on the equatorial plate.
- CSister chromatids remain associated at their centromeres.
- DMicrotubules from the opposite poles of the spindle attach to the kinetochore of homologous chromosomes.
Correct answer
B. Bivalent chromosomes align on the equatorial plate.
Step-by-step solution
The final stage of meiotic prophase I is diakinesis. This is marked by terminalisation of chiasmata. : During this phase the chromosomes are fully condensed and the meiotic spindle is assembled to prepare the homologous chromosomes for separation. By the end of diakinesis, the nucleolus disappears and the nuclear envelope also breaks down. Diakinesis represents transition to metaphase The bivalent chromosomes align on the equatorial plate. The microtubules from the opposite poles of the spindle attach to the kineto