Question

The _____ phase is when multiple rounds of duplication happen, but with no cytokenisis.

Answer 1

The S phase of the cell cycle is when DNA replication occurs without cytokinesis, setting the stage for later mitosis where chromosomes are aligned and separated into two new cells.

Step-by-step explanation:

The phase in which multiple rounds of duplication happen, but with no cytokinesis, typically refers to the S phase of the cell cycle. During this phase, nuclear DNA is replicated forming identical pairs of DNA molecules known as sister chromatids, connected at the centromeric region.

This ensures that each daughter cell will receive an exact copy of the DNA during cell division. Following the S phase, cells enter the mitotic phase, which involves two major steps: mitosis and cytokinesis. In mitosis, duplicated chromosomes are aligned and separated, whereas cytokinesis is the physical division of the cytoplasm, resulting in two identical daughter cells.

Answer 2

The S phase of the cell cycle involves DNA replication without cell division, resulting in identical sister chromatids. This phase precedes the mitotic phase, where actual cell division occurs through mitosis and cytokinesis.

Step-by-step explanation:

The phase in which multiple rounds of duplication happens, but with no cytokinesis, is the S phase, also known as the Synthesis phase. During the S phase, DNA replication occurs, resulting in the formation of identical sister chromatids firmly attached at the centromeric region. This phase is crucial for DNA duplication without cell division and is part of the interphase of the cell cycle, which also includes the G₁ and G₂ phases and prepares the cell for the subsequent mitotic phase.

In contrast to the S phase, during the mitotic phase, which includes both mitosis and cytokinesis, the cell will actually divide. Mitosis is nuclear division during which duplicated chromosomes are segregated into daughter nuclei, and it is composed of several stages: prophase, prometaphase, metaphase, anaphase, and telophase. Subsequently, cytokinesis completes the process by physically separating the cytoplasmic components into two new identical daughter cells.