NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
When the number of chromosomes is already reduced to half in the first reduction division of meiosis. What is the necessity of the second mitotic division?
Options
- AThe division is required for the formation of four gametes.
- BThe division ensures equal distribution of genes on the chromosomes.
- CThe division ensures equal distribution of haploid chromosomes.
- DThe division is required for segregation of replicated chromosomes.
Correct answer
D. The division is required for segregation of replicated chromosomes.
Step-by-step solution
There are two stages in the meiotic division, meiosis I and meiosis II. These stages mainly involve the reductional and equational division of the cells. In the first meiotic division, the chromosome number is reduced to half (haploid condition) and the chromatids move to the opposite poles. In the second meiotic division which resembles normal mitosis, there is the formation of four gametes and the chromosomes are distributed to each gamete, therefore the second meiotic division is required for the segregation of