Table of Contents
- 1 In which phase and stage of mitosis does the chromatin DNA duplicate?
- 2 During what phase of mitosis does DNA uncoil into strands?
- 3 During what phase does the chromosomes uncoil and form long chromatin strands?
- 4 In what phase is chromatin pulled apart?
- 5 What happens in the metaphase stage of mitosis?
- 6 What are the 4 stages of mitosis?
In which phase and stage of mitosis does the chromatin DNA duplicate?
During the S phase, DNA is duplicated into two sister chromatids, and centrosomes, which give rise to the mitotic spindle, are also replicated.
During what phase of mitosis does DNA uncoil into strands?
During telophase, chromosomes arrive at opposite poles and unwind (uncoil) into thin strands of DNA, the spindle fibers disappear, and the nuclear membrane reappears.
During which phase of mitosis is the DNA duplicated?
In the eukaryotic cell cycle, chromosome duplication occurs during “S phase” (the phase of DNA synthesis) and chromosome segregation occurs during “M phase” (the mitosis phase).
During which phase is the DNA duplicated?
S phase is the period during which DNA replication occurs.
During what phase does the chromosomes uncoil and form long chromatin strands?
Telophase. During telophase (Figure below), the chromosomes begin to uncoil and form chromatin. This prepares the genetic material for directing the metabolic activities of the new cells. The spindle also breaks down, and new nuclear membranes (nuclear envelope) form.
In what phase is chromatin pulled apart?
During prophase, the chromosomes condense and the nuclear envelope dissolves. During metaphase, the chromosomes align at the center of the cell. During anaphase, the sister chromatids are separated and pulled to opposite ends of the cell.
What is the G2 phase do?
Gap 2 Phase The last part of interphase is called the G2 phase. The cell has grown, DNA has been replicated, and now the cell is almost ready to divide. This last stage is all about prepping the cell for mitosis or meiosis. During G2, the cell has to grow some more and produce any molecules it still needs to divide.
What happens during the G1 and G2 phases?
Initially in G1 phase, the cell grows physically and increases the volume of both protein and organelles. In S phase, the cell copies its DNA to produce two sister chromatids and replicates its nucleosomes. Finally, G2 phase involves further cell growth and organisation of cellular contents.
What happens in the metaphase stage of mitosis?
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell. As metaphase continues, the cells partition into the two daughter cells.
What are the 4 stages of mitosis?
These phases are prophase, prometaphase, metaphase, anaphase, and telophase.
What phase is DNA spread out as chromatin and nuclear membrane is visible?
2. Prophase. This is the first step of mitosis. The nuclear membrane breaks apart and the chromatin condenses into chromosomes.
What does G1 phase do?
G1 phase. G1 is an intermediate phase occupying the time between the end of cell division in mitosis and the beginning of DNA replication during S phase. During this time, the cell grows in preparation for DNA replication, and certain intracellular components, such as the centrosomes undergo replication.