A is incorrect, by M-phase the cell is prepared for division and the DNA has already been duplicated. B is incorrect, G1 phase is when the cell is growing and preparing for DNA replication. D is incorrect, telophase is a segment of Mitosis, When telophase occurs the DNA has already been replicated and the cell is ready to be divided into separate daughter cells. C is correct, S-phase is when the DNA is synthesized through DNA replication.
2. Put this diagram of Mitosis into the correct order;
B is incorrect, Mitosis does not occur in this order. By Anaphase the spindles have reduced and the chromosomes are being towards the poles. C is incorrect. Mitosis does not occur in this order. Cytokinesis is the splitting of the cell into two daughter cells.D is incorrect, mitosis does not occur in this order. By Telophase new membranes have formed and are nearly ready for cytokinesis. A is correct, the stages of mitosis happen in this order. Beginning with prophase and ending with cytokinesis.
3. How many chromosome pairs belong in an average pair of daughter cell after Cytokinesis?
a) 46 b) 92 c) 21 d) 23
A is incorrect, while an average parent cell should contain 46 chromosomes, an individual daughter cell does not have this many pairs after cytokinesis. B is incorrect. 92 chromosomes are too many, and would not belong in each individual daughter cell. C is incorrect. The daughter cell does not contain 21 chromosomes after cytokinesis, this quantity is too little. D is correct. Considering there are 46 chromosomes in an average parent cell, and the daughter cells must be genetically identical. Each would contain 23 chromosomes to be equal and identical to one another.
4. Give a brief summary in at least 4 sentences how Mitosis works?
There are 5 stages to mitosis. These stages are prophase, metaphase, anaphase, telophase and finally cytokinesis. During prophase the nucleus around the genetic material begins to break down and the spindles move towards the poles. Afterwards, during metaphase, the spindles will attach to the centrioles of the sister chromatids which have aligned along the center of the cell. Thirdly, the spindles will shorten as they pull the sister chromatids apart to opposite poles of the cell during anaphase. Then a new membranes forms and surround the 23 pairs of separated chromosomes which have extended, during telophase. Finally cytokinesis occurs, which cleaves the cell into two separate identical daughter cells.
5. How do daughter cells reproduce after Cytokinesis?
Daughter cells are genetically identical, with each average ones containing 23 chromosomes. These cells must reproduce to make trillions of more cells. The daughter cells begin the Cell Cycle again, and the cells split at an exponential rate. Until there a trillions of cells present in the body.