Question

5. If the content of DNA in a chromosome is 2C after M
phase, what will be the content of DNA at G, S, and
anaphase of mitosis?
2C, 4C, 2C (B) 2C, 4C, 4C
4C, 4C, 2C (D) 4C, 4C, 4C
​

Answer 1

Explanation:

DNA replication occurs in S phase and DNA amount doubles up i.e., a cell with 2C DNA in G, phase will now have 4C DNA. G2, phase is second growth phase where DNA content remains 4C. M phase is the phase of division where DNA content either regains 2C level (mitosis) or becomes halved i.e. 1C (in meiosis).