- Exam
- NEET
- Year
- 2023
- Subject
- Botany
- Chapter
- Cell Cycle and Cell Division
NEET 2023 · Botany · Cell Cycle and Cell Division
Select the correct statements. A. Tetrad formation is seen during...
Select the correct statements.
A. Tetrad formation is seen during the Leptotene.
B. During Anaphase, the centromeres split and chromatids separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed during Telophase.
E. Crossing over takes place between sister chromatids of homologous chromosomes.
Choose the correct answer from the options given below:
Options
- AB and E only
- BA and C only
- CB and D only
- DA, C and E only
Correct answer
C. B and D only
Step-by-step solution
Tetrad formation occurs during the zygotene stage of meiotic prophase. Hence, statement A is not correct.
Anaphase stage is characterised by the following key events:
- Centromeres split and chromatids separate.
- Chromatids move to opposite poles.
Hence, statement B is correct.
Terminalisation of chiasma occurs during diplotene, after crossing over at pachytene, and terminalisation completion takes place in diakinesis. Hence, statement C is not correct.
During telophase, the nucleolus, endoplasmic reticulum (ER) and Golgi apparatus reappear. Hence, statement D is correct.
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. Hence, statement E is not correct.
Hence, option C is correct, i.e, statement B and D is correct.