CELL STRUCTURES AND FUNCTION
CELL DIVISION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
One cell without a nucleus will be produced.
|
|
|
Two cells without a nucleus will be produced.
|
|
|
One cell with two identical nuclei will be produced.
|
|
|
Two cells with one nucleus each will be produced.
|
Detailed explanation-1: -Cytokinesis is the final step of mitosis in which the contents of the cell (cytoplasm and nuclei) are separated into two distinct, identical daughter cells. Mitosis without cytokinesis results in a cell with more than one nucleus but a connected cytoplasm (syncytium). A multinucleated cell is one with several nuclei.
Detailed explanation-2: -Cytokinesis failure leads to both centrosome amplification and production of tetraploid cells, which may set the stage for the development of tumor cells.
Detailed explanation-3: -The cell then splits to form two genetically identical daughter cells, in a process known as cytokinesis. The end of cytokinesis denotes the end of telophase.
Detailed explanation-4: -Cytokinesis accompanies the division of genetic material in mitosis and meiosis to physically separate the cells. If cytokinesis did not happen, multinucleated cells would form. That is, cells would have multiple nuclei (formed from mitotic divisions) but one single cytoplasm (due to the lack of cytokinesis).
Detailed explanation-5: -Failures during the mitotic process or cytokinesis potentially cause the formation of cells with abnormal ploidy, such as aneuploidy or tetraploidy.