Mitosis
This is the process of the cytoplasm seperating
What is cytokinesis?
What happens before cell division?
Before cell division occurs, the cell replicates, or copies, all of its DNA.
Name the main events of the cell cycle.
What is G1, S, and G2?
A disorder in which some of the body's own cells lose the ability to control growth
What is cancer?
One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope
What is a centriole?
first and longest phase of mitosis, during which the chromosomes become visible and the centrioles separate and take up positions on the opposite sides of the nucleus
What is prophase?
How is a cell's DNA like the books in a library?
Each daughter cell gets one complete set of genetic information. Thus, each daughter cell receives its own genetic “library.”
Describe what happens during each of the four phases of mitosis.
During prophase, the chromosomes become visible. During metaphase, the chromosomes line up across the center of the cell. During anaphase, the centromeres that join the sister chromatids split, allowing the sister chromatids to separate and become individual chromosomes. In telophase, the chromosomes, which were distinct and condensed, begin to disperse into a tangle of dense material.
What happens when cells do not respond to the signals that normally regulate their growth?
they divide uncontrollably.
This is the process by which a cell divides into two identical new daughter cells
What is mitosis?
The second phase of mitosis, during which the chromosomes line up across the center of the cell
What is metaphase?
As a cell increases in size, which increases more rapidly, its surface area or its volume?
Each daughter cell has an increased ratio of surface area to volume.
Describe what happens during interphase.
an “in-between” period of growth in the cell cycle
How do cells respond to contact with other cells?
When cells come into contact with other cells, they respond by not growing.
This is the area where the chromatids of a chromosome are attached
What is the centromere?
the third phase of mitosis, during which the chromosome pairs separate and move toward opposite poles
What is anaphase?
Give two reasons why cells divide.
Mr. Richard decides if correct.
What are chromosomes made of?
Chromosomes are made up of DNA,which carries the cell's coded genetic information,and proteins
Why can cancer be considered a disease of the cell cycle?
A vey large number of cancer cells have a defect in a gene called p53, which normally halts the cell cycle until all chromosomes have been properly replicated.
One of two identical “sister” parts of a duplicated chromosome
What is chromatid?
The fourth and final phase of mitosis, during which the chromosomes begin to disperse into a tangle of dense material
What is telophase?
What happens before a cell becomes too large?
Before it becomes too large, a growing cell divides forming two “daughter” cells.
How do prokaryotic cells divide?
In most prokaryotes, the rest of the process of cell division is a simple matter of separating the contents of the cell into two parts.
What chemicals regulate the cell cycle?
What is cyclin?
Fanlike microtubule structure that helps separate the chromosomes during mitosis
What is a spindle?