What is the proper sequence in mitosis?
Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. These phases occur in this strict sequential order, and cytokinesis - the process of dividing the cell contents to make two new cells - starts in anaphase or telophase.
1. Prophase - During prophase, chromosomes get visible (chromatids), the centrioles migrate to the poles, nuclear membrane and nucleolus disappear and spindle formation is seen. Prophase in mitosis is longer than any other phases of mitosis because the cell has to prepare for the actual division that takes place from early through late prophase.
2. Metaphase - During this, chromosomes lineup around the centre (Cells in metaphase have the chromosomes, which appear as long thin strands under the microscope).
3. Anaphase - here, chromatids separate and move to opposite poles by spindle fibers. This allows each daughter cell to have an identical copy of each of the original cell’s chromosomes.
4.Telophase - During this phase, chromosomes disappear (become chromatin), nuclear membrane reforms, nucleoli reappears, spindle disappears and centrioles duplicate.
The correct answer is option D.
Which of the phases of mitosis is the longest?
Prophase is the longest phase of mitosis. This phase separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.
In a cell cycle, during which phase chromosomes are arranged on the equatorial plate?
Hence, the correct answer is option A: Metaphase
How many mitotic divisions are needed for a single cell to make 128 cells?
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells.
Hence the process of the division will be:
► 1 cell gives 2 daughter cells (1st mitosis)
► 2 cells give 4 daughter cells (2nd mitosis)
► 4 cells give 8 daughter cells (3rd mitosis)
► 8 cells give 16 daughter cells (4th mitosis)
► 16 cells give 32 daughter cells (5th mitosis)
► 32 cells give 64 daughter cells (6th mitosis)
► 64 cells give 128 daughter cells (7th mitosis)
Hence 7 mitotic divisions cell needed for a single cell to make 128 cells.
Centromere is required for
So, the correct answer is option C.
At which stage of mitosis, do chromatids separate and pass to different poles?
The paired chromosomes (sister chromatids) separate and begin moving to opposite ends (poles) of the cell. Spindle fibers not connected to chromatids lengthen and elongate the cell. At the end of anaphase, each pole contains a complete compilation of chromosomes.
Cell division is initiated in plants by:
A cell plate is laid during:
In mitosis, the number of chromosome sets in daughter cells will be:
Therefore the answer that the 2 daughter cells contain equal genetic as the mother cell is correct.
Which stages of cell division do the figures A and B represent?
In Fig.A cromatid are moving to opposite pole i.e Late anaphase.
In Fig.B all organelles are present i.e prophase.