NEETBotanyCell Cycle and Cell Division
What is the role of the spindle in Metaphase 1 of meiosis?
Options
- ATo separate homologous chromosomes
- BTo attach to the kinetochore of homologous chromosomes
- CTo keep sister chromatids associated at their centromeres
- DTo dissolve the synaptonemal complex
Correct answer
B. To attach to the kinetochore of homologous chromosomes
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