Question

Chromosomes are duplicated during what stage of the cell cycle?

a) G1 phase
b) S phase
c) G2 phase
d) M phase

Answer 1

Chromosomes are duplicated during the S phase of the cell cycle, where DNA replication results in identical sister chromatids joined at the centromere, and the centrosome is also duplicated.

Step-by-step explanation:

The chromosomes are duplicated during the S phase of the cell cycle. In this phase, DNA replication occurs and results in the formation of two identical copies of each chromosome, known as sister chromatids. These sister chromatids are held together at the centromere.

During the cell cycle, chromosomes are duplicated during the S phase (synthesis phase). This is the period in which DNA replication occurs, leading to the formation of two identical copies of each chromosome, known as sister chromatids. These chromatids are held together at a specific region known as the centromere. The S phase also features the duplication of the centrosome, which plays a crucial role during cell division by giving rise to the mitotic spindle. The spindle facilitates the movement of chromosomes during the later stages of the cell cycle, specifically mitosis.

Answer 2

Chromosomes are duplicated during the S phase of the cell cycle, where DNA replication results in identical sister chromatids joined at the centromere, and the centrosome is also duplicated.

Step-by-step explanation:

The chromosomes are duplicated during the S phase of the cell cycle. In this phase, DNA replication occurs and results in the formation of two identical copies of each chromosome, known as sister chromatids. These sister chromatids are held together at the centromere.

During the cell cycle, chromosomes are duplicated during the S phase (synthesis phase). This is the period in which DNA replication occurs, leading to the formation of two identical copies of each chromosome, known as sister chromatids. These chromatids are held together at a specific region known as the centromere. The S phase also features the duplication of the centrosome, which plays a crucial role during cell division by giving rise to the mitotic spindle. The spindle facilitates the movement of chromosomes during the later stages of the cell cycle, specifically mitosis.