The regular sequence of growth and division that cells undergo. There are three major parts to ti: Interphase, Mitosis, and Cytokinesis.
Reasons for cell division
to reproduce, to repair damage, so your body can grow and so the essential substances can reach every part of the cell
The stage of the cell cycle that takes place before cell division occurs. During this stage the cell grows, copies its DNA, and prepares to divide.
The stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell.
The final stage of the cell cycle, in which the cell's cytoplasm divides, distributing the organelles into each of the two new cells.
In this phase, the chromatin in the nucleus condenses to form chromosomes. Structures called spindle fibers form a bridge between the ends of the cell. The nuclear membrane breaks down.
In this phase, the chromosomes line up across the center of the cell. Each chromosome attaches to a spindle fiber at its centromere, which still holds the chromatids together at this point.
In this phase, the centromeres split. The two chromatids separate. One chromatid moves along the spindle fiber to one end of the cell. The other chromatid (a copy) moves to the opposite end. The cell becomes stretched out as the opposite ends pull apart.
In this phase, the chromosomes begin to stretch out and lose their rodlike appearance. This occurs in the two regions at the ends of the cell. A new nuclear membrane forms around each region of chromosomes.
Deoxyribonucleic acid; the genetic material that carries information about an organism and is passed from parent to offspring.
A double rod of condensed chromatin, which contains DNA and carries genetic information.
String-like fibers that help to guide the chromatids to the opposite ends of the cell during anaphase. (In class, we compared these to "puppet strings.")
Located in the center of the "X", they hold the chromatids together in a chromosome. They also help the chromosomes attach to the spindle fibers.
A structure which forms across the middle of the cell during cytokinesis in plant cells. This structure gradually develops into new cell membranes between the two daughter cells. New cell walls then form around the cell membranes.
During cytokinesis in animal cells, the cell membrane pinches in around the middle of the cell. This pinched area is called the ****.
The cells that are produced as a result of mitosis. These cells are identical to each other, and also to the original parent cell.
During mitosis, the chromosomes move toward this along the spindle fibers.