NEETBotanyCell Cycle and Cell Division
Read the following statements regarding the substages of Prophase-I of meiosis and choose the incorrect statement.
Options
- ADuring leptotene, the compaction of chromosomes continues throughout the stage.
- BThe beginning of diplotene is recognised by the dissolution of the synaptonemal complex.
- CBy the end of diakinesis, the nucleolus disappears and the nuclear envelope breaks down.
- DThe bivalent chromosomes clearly appear as tetrads during the zygotene stage.
Correct answer
D. The bivalent chromosomes clearly appear as tetrads during the zygotene stage.
Step-by-step solution
Statement 1 is correct: The compaction of chromosomes continues throughout the leptotene stage as they become gradually visible under the light microscope. Statement 2 is correct: The dissolution of the synaptonemal complex marks the beginning of the diplotene stage. Statement 3 is correct: Diakinesis represents the transition to metaphase, and by its end, the nucleolus disappears and the nuclear envelope breaks down. Statement 4 is incorrect: According to NCERT, while the complex formed by a pair of synapsed homol