NEETBotanyCell Cycle and Cell Division
What is the meaning of 2C in DNA replication?
Options
- Athe initial amount of DNA before replication
- Bthe final amount of DNA after replication
- Cthe number of chromosomes after replication
- Dthe number of cells after replication
Correct answer
A. the initial amount of DNA before replication
Step-by-step solution
S or synthesis phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C. However, there is no increase in the chromosome number; if the cell had diploid or 2n number of chromosomes at G1, even after S phase the number of chromosomes remains the same, i.e., 2n. In animal cells, during the S phase, DNA replication begins in the nucleus, and the centriole duplicates in the cyt