Botany - Cell Cycle and Cell Division Question with Solution | TestHub
BotanyCell Cycle and Cell DivisionMeiosisMedium2 minPYQ_2015
BotanyMediumsingle choice
Arrange the following events of meiosis in the correct sequence:
i. Crossing over
ii. Synapsis
iii. Terminalisation of chiasmata
iv. Disappearance of the nucleolusNEET 2015 (Phase 2)
Options:
Answer:
A
Solution:
The sequence of event during meiosis are:
(A) Synapsis (Zygotene)- The homologous chromosomes start pairing with the help of the synaptonemal complex.
(B) Crossing over (Pachytene)- The non-sister chromatids of homologous chromosomes exchanges their parts. Enzyme recombinase takes part in this process.
(C) Terminalisation of chiasmata (Diakinesis)- The chiasmata moves towards the end of the chromosome (Telomere).
(D) The disappearance of nucleolus- The degeneration of nucleolus and nuclear membrane takes place which marks the end of prophase-I.
Stream:NEETSubject:BotanyTopic:Cell Cycle and Cell DivisionSubtopic:Meiosis
⏱ 2mℹ️ Source: PYQ_2015
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