Card Set Information
mitosis and cell cycle
In Mitosis, after the chromosomes are copied...
mitosis distributes one chromosome copy to each of two daughter cells
What do mitosis and cytokinesis produce?
2 cells that are identical to the parent cell
what are the 4 phases that eukaryotic cells go through?
What is mitosis?
division of genetic material in nucleus that produces daughter cells genetically identical to the parent cell
What is cytokinesis?
the division of the cytoplasm into the 2 daughter cells
what 3 things can Mitosis go through?
Asexual reproduction AND mitosis
-asexual reproduction is the basis of mitosis
What is mitosis only involved in?
production of somatic (body) cells
-refers to the condensed chromosomes that become evident when a cell is undergoing mitosis
the two strands on top have identical DNA
preparationo of experiment to find out how long S phase
-fed radioactive thymidine to cells
-then waited for hours to see where the cells where
(experiment/thymidine) In the beginning where is the only place where cells have thymidine?
in S phase
(experiment/thymidine) why was thymidine incorporated only in these 3 cells in S phase?
These cells were going through DNA synthesis which is the only time which cells can incorporate things in their DNA
(experiment/thymidine) In the beginning would adenosine or cytosine give the same pattern?
no, they would be present in all the other cells except mitosis because they can be read by RNA
(experiment/thymidine) After 5 mins, are there cells that are going through mitosis and have thymidine?
(experiment/thymidine) After two hours, are there cells that are going through mitosis and have thymidine?
(experiment/thymidine) After 4 hours, are there cells that are going through mitosis and have thymidine?
(experiment/thymidine) After 6 hours, are tehre cells taht are going through mitosis and have thymidine?
(experiment/thymidine) After 8 hours, are there cells that are going through mitosis and ahve thymidine?
(experiment/thymidine) After 10 hours, are there cells that are going through mitosis and have thymidine
(experiment/thymidine) After 12 hours, are there cells that are going through mitosis and have thymidine?
(experiment/thymidine) How long is S-phase?
8 hours long
(experiment/thymidine) What was the conclusion of the experiment?
-S-phase is 8 hours long
-there is a gap between S phase and M phase
*G1 and G2
Does a 4 unreplicated chromosomes have same amount of DNA than 4 replicated chromosomes?
no, the 4 replicated chromosomes have twice the DNA
How does a G1 cell look like?
-has 4 unreplicated chromosomes
(the one in left)
How do chromosomes look like in S phase and G2?
-has 4 replicated chromosomes
(the one in right)
-replicacted chromosomes condense at start of mitosis
-during mitosis, sister chromatids separate
-2 daughter cells are formed by citokinesis
-parent cell has twice as muhc of DNA than one daughter cell
What is a single strand called?
What are sister chromatids?
two single strands put together