When are the chromosomes visible during the entirety of the cell cycle?
only during interphase
only during G2 phase
only during mitosis
only during G1 phase
only during interphase
Use properties of operations and rules for multiplying signed numbers to multiply −2\5 by 3\10
. Write the answer in simplest form.
Chromosomes are visible during the entirety of the cell cycle, except during interphase.
During the entirety of the cell cycle, chromosomes are visible in a specific phase called mitosis. Mitosis is the phase of the cell cycle where the cell divides to create two identical daughter cells. During mitosis, the chromosomes condense and become visible under a microscope.
To understand this concept, let's briefly go through the cell cycle stages. The cell cycle consists of four main phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (mitosis).
During G1 phase, the cell grows, carries out its normal functions, and prepares for DNA replication. The chromosomes are not visible during this phase, as they are in a less condensed form called chromatin.
In the S phase, DNA replication occurs, where each chromosome is duplicated to form identical sister chromatids. However, even though the chromosomes have duplicated, they are still not visible because they remain in a less condensed form called chromatin.
In G2 phase, the cell continues to grow and prepare for cell division. Here, the chromosomes start to condense and become visible as distinct structures under a microscope. However, it's important to note that G2 phase is not the entirety of the cell cycle, so the chromosomes are not visible throughout the entire cycle.
Finally, during the M phase (mitosis), the condensed chromosomes align, separate, and are distributed equally into the two daughter cells. Mitosis is when chromosomes are most prominently visible, as they are fully condensed and easily identifiable.
To summarize, the chromosomes are only visible during the specific phase of mitosis, while they are in a highly condensed form. They are not visible during the other phases of the cell cycle, such as G1, S, or G2.