Question

Chromosomes duplication occurs in which of the following phases G1 Phase b) G2 phase c) S phase d) Prophase ​

Answer 1

Answer:

The Write answer is c) S phase

Explanation:

The cell cycle has three phases that must occur before mitosis. The three phases are collectively known as INTERPHASE.

They are G

1

,S&G

2

. The G stands for gap & S stands for synthesis. The G

1

& G

2

phase are times of growth & preparation for major changes. The synthesis phase is when the cell duplicates the DNA in its genome.

Synthesis Phase:-

During the synthesis phase, a cell copies its DNA. DNA replication is a massive effort that requires a lot of proteins. Since DNA does not exit by itself in a cell but is packaged by proteins, more packaging proteins must also be made during the S phase. Histones are proteins around which DNA wraps. The production of new histone proteins starts at the same time as DNA synthesis.

In mitosis, chromosome duplication occurs during interphase.