What happens in the first stage of mitosis and why is it important?
The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis. The DNA in chromosomes and their copies condenses to become more visible. … The cell membrane pinches in and eventually divides into two daughter cells.
What does the first stage of mitosis do?
Prophase is the first stage in mitosis, occurring after the conclusion of the G2 portion of interphase. During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.
What happens during each stage of mitosis?
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear envelope …
What is the stage of mitosis?
Today, mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.
What is the result of mitosis?
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.
What are some examples of mitosis?
Mitosis is the process of dividing a cell and its nucleus into two cells which each have their own nucleus. An example of mitosis is the way the skin cells covering a child’s body all multiply while they are growing.
Which of the following is true of mitosis?
The correct answer is A. It maintains the same chromosome number in the daughter cells as in the parent cell. Explanation: Mitosis is also known as equational division because in mitosis the replicated chromosome becomes equally divided and distributed into two daughter cells.
Which stage of mitosis takes the least amount of time?
The metaphase plate is an imaginary line equidistant from the spindle’s 2 poles. In anaphase, the shortest stage of mitosis, the sister chromatids break apart, and the chromosomes begin moving to opposite ends of the cell.