Chapter 11 PatrIck fitzsimmons
THE CELL CYCLE
The cell cycle (or cell-division cycle) is the series of events that take place in a cell leading to its division and duplication of its DNA (DNA replication) to produce two daughter cells.
Interphase is the resting phase between successive mitotic divisions of a cell, or between the first and second divisions of meiosis.
Prophase the first stage of cell division when the chromosomes become visible as paired chromatids and the nuclear envelope disappears. The first prophase of meiosis includes the reduction division.
Metaphase is the second stage of cell division when the chromosomes become attached to the spindle fibers.
Anaphase is the stage of cell division when the chromosomes move away from one another to opposite poles of the spindle.
Telophase is the final phase of cell division where the chromosomes move to opposite ends of the cell and two nuclei are formed.
A telomere is a region of repetitive nucleotide sequences at each end of a chromosome, which protects the end of the chromosome from deterioration or from fusion with neighboring chromosomes.
Cancer is a term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems.