NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
Select the correct option. Column I Column II A . Synapsis 1 . Pachytene B . Centromere split 2 . Zygotene C . The action of enzyme recombinase 3 . Anaphase II D . Centromeres do not split 4 . Anaphase I
Options
- AA : 2 , B : 1 , C : 3 , D : 4
- BA : 2 , B : 3 , C : 1 , D : 4
- CA : 1 , B : 2 , C : 3 , D : 4
- DA : 2 , B : 3 , C : 4 , D : 1
Correct answer
B. A : 2 , B : 3 , C : 1 , D : 4
Step-by-step solution
Synapsis is the pairing of the homologous chromosome, which occurs during zygotene. The centromere split and sister chromatids move to opposite pole during anaphase II. Recombinase enzyme carries out recombination or crossing over during pachytene of prophase I. Centromere does not split during anaphase I and disjunction of chromosomal pair occurs.