NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
Which of the following holds true for the pachytene stage of meiotic cell division?
Options
- AThis stage leads to genetic recombination, hence variations in sexually reproducing organisms.
- BIn this stage, the process of exchange of genetic material between sister chromatids of non- homologous chromo
- CThis stage takes place only in haploid cells of the body eg. Gametes
- DAll of these
Correct answer
D. All of these
Step-by-step solution
The meiotic cell division comprises two successive nuclear division the meiosis I and meiosis II. The meiosis I have four stages prophase I, metaphase 1, anaphase 1, and telophase 1. The prophase I have further been divided into five phases depending on the chromosomal behavior. The pachytene is the third phase of the five phases where the four chromatids appear as tetrads. Crossing over between two homologous chromosomes takes place during this phase and therefore leads to the recombination of the genetic material