Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
mitosis |
The purpose of mitosis is cell division: making two cells out of one. The DNA is replicated in Interphase (during the S phase). At the end of replication, the cell contains 2 identical sets of DNA. In mitosis the chromosomes have to break apart so that each new cell only has one set of chromosomes. Mitosis is divided into four phases: prophase, Metaphase, Anaphase and telophase. |
|
Interphase |
made up of three subphases: G1,S,G2.The DNA is replicated in the S phase. |
|
Prophase |
Prophase is characterized by four events. 1. Chromatin condenses to become chromosomes. 2. The nuclear membrane (envelope) disappears. 3. Centrioles have separated and moved to opposite sides of the cell |
|
Metaphase |
1. Chromosome line up across the center of the cell. 2.Each chromosome attaches to a spindle fiber at its centromere |
|
Anaphase |
1. Centromeres that join the sister chromatids split. 2. sister chromatids separte becoming individual chromosomes. 3. Separated chromatids more to opposite of cell |
|
telophase |
(last part of mitosis) 1. Chromosomes (each consisting of a single chromatid) begin to lose their rod like appearance. They are becoming chromatin again. 2. A new nuclear envelope forms ( nucleas ) around the chromosomes at each side of the cell. 3.Spindle fiber break down and dissolve. 4. Cytokinesis begins |
|
cytokinesis |
1. Cytokinesis is the division of the cytoplasm into 2 individual cells. 2. The process of cytokinesis differs some what in plant and animal cells. 3. In animals cells the cell membrane pinches the cell into mearly daughter cells 4. In plant cells a structure known as a cell plate forms midway between the 2 nucleus which gradually develops into separating membrane. |
