Question: 170 Select the correct statements.
A. Tetrad formation is seen during 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 chromosome.
Choose the correct answer from the options given below:
(1) A, C and E only
(2) B and E only
(3) A and C only
(4) B and D only
Answer: Option (4)
Explanation:
Tetrad formation occurs during zygotene, not leptotene, so statement A is incorrect.
During anaphase of mitosis, the centromeres split and sister chromatids separate and move to opposite poles, so statement B is correct.
Terminalization of chiasmata occurs during diplotene, not pachytene, so statement C is incorrect.
During telophase, the nuclear membrane reappears and nucleolus, Golgi complex and endoplasmic reticulum are reformed, so statement D is correct.
Crossing over takes place between non-sister chromatids of homologous chromosomes, not sister chromatids, so statement E is incorrect.
Therefore, the correct statements are B and D.