NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
The enzyme recombinase is required at which stage of meiosis?
Options
- APachytene
- BZygotene
- CDiplotene
- DDiakinesis
Correct answer
A. Pachytene
Step-by-step solution
The first phase of Meiosis 1 is Prophase 1 . It is further divided into five phases. 1 ) Leptotene: Condensation of Chromatin material takes place in this stage 2 ) Zygotene: The homologous chromosome formation is seen in this stage and formation of synaptonemal complex occurs. 3 ) Pachytene: At this point a tetrad of chromosomes is formed and this is known as bivalent. Crossing over is also seen in this stage Thus recombination nodules are formed which requires Recombinase enzymes. 4 ) Diplotene: The synaptonemal