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Because each chromosome was duplicated during S phase, it now consists of two identical copies called sister chromatids that are attached at a common center point called the centromere.
In addition, chromosomal DNA is duplicated during a subportion of interphase known as the S, or synthesis, phase. As the two daughter DNA strands are produced from the chromosomal DNA...
11 Μαΐ 2006 · In most cells, there is a narrow window of time during which DNA is synthesized. The S stands for synthesis. G2 phase: The period after DNA synthesis has occurred but before the start of prophase.
Describe the different forms that DNA takes before and during cell division in a eukaryotic cell. Identify the four phases of mitosis in an animal cell, and summarize what happens during each phase. Explain what happens during cytokinesis in an animal cell.
During interphase, G 1 involves cell growth and protein synthesis, the S phase involves DNA replication and the replication of the centrosome, and G 2 involves further growth and protein synthesis. Mitosis follows interphase, and cytokinesis follows mitosis.
Control of DNA synthesis and mitosis is positive—that is, the active agent promotes mitosis in the recipient cell. Cells can be advanced into the next stage before they planned it by adding the appropriate factors to their cytosol.
During interphase, G 1 involves cell growth and protein synthesis, the S phase involves DNA replication and the replication of the centrosome, and G 2 involves further growth and protein synthesis. The mitotic phase follows interphase.
