NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
When synapsis is complete all along the chromosome, the cell is said to have entered a stage called
Options
- AZygotene
- BPachytene
- CDiplotene
- DDiakinesis
Correct answer
B. Pachytene
Step-by-step solution
Synapsis is the pairing of homologous chromosomes during the zygotene stage of meiosis. Each pair is called bivalent. One chromosome of the pair comes from the male parent and other from the female parent. Each member of the pair is of the same length, their centromeres are in the same position and they usually have the same number of genes arranged in the same order. After zygotene stage, cell enters in pachytene stage in which the bivalents become spiralled, shortened and thickened.