NEETBotanyCell Cycle and Cell Division
What happens during the leptotene stage of meiosis?
Options
- AChromosomes start pairing together
- BChromosomes become gradually visible under the light microscope
- CChromosomes are no longer visible under the light microscope
- DChromosomes start to unravel
Correct answer
B. Chromosomes become gradually visible under the light microscope
Step-by-step solution
Prophase I: Prophase of the first meiotic division is typically longer and more complex when compared to prophase of mitosis. It has been further subdivided into the following five phases based on chromosomal behaviour, i.e., Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis. During leptotene stage the chromosomes become gradually visible under the light microscope. The compaction of chromosomes continues throughout leptotene. This is followed by the second stage of prophase I called zygotene.