During which phase of the cell cycle does DNA synthesis occur?

DNA synthesis occurs during the S Phase of the cell cycle. This phase is specifically designated for the replication of the cell’s genetic material. During S Phase, each chromosome is duplicated, resulting in two sister chromatids for each chromosome, which ensures that when the cell divides, each daughter cell will receive an identical set of chromosomes.

The significance of this phase is underscored by its critical role in ensuring genetic continuity and stability during cellular division. If DNA synthesis did not occur during this time, the cells produced after division would either lack crucial genetic information or have an incomplete set of chromosomes, leading to potential developmental issues or diseases.

The other phases of the cell cycle play distinct roles: Gap 1 is focused on cell growth and preparing for DNA replication, Gap 2 involves additional growth and preparation for mitosis, and M Phase is where actual cell division occurs. However, DNA synthesis specifically takes place only in the S Phase.