Cell Division Flashcards
1
Q
What are the stages of the cell cycle
A
Interphase, Mitosis, Cytokinesis
2
Q
A
3
Q
What happens in interphase
A
Cell grows, DNA replicates, organelles made
4
Q
Purpose of mitosis
A
Growth and repair of tissues, and reproduce asexually
5
Q
What happens in cytokinesis
A
Cytoplasm splits, two identical cells form
6
Q
How many chromosomes in a human cell
A
46 (23 pairs)
7
Q
What are chromosomes
A
DNA molecules carrying genes
8
Q
What are stem cells
A
Unspecialized cells that divide and change
9
Q
Where are stem cells found
A
Embryos, bone marrow, plant meristems
10
Q
Pros and cons of stem cells
A
+ Treat diseases, - Ethical issues
11
Q
What is differentiation
A
Cells specialize for a function
12
Q
When does differentiation happen
A
Animals – early; Plants – lifelong
13
Q
Describe what happens in each stage of the cell cycle
A
- In interphase, the cell grows and increases the number of subcellular structures. The DNA is copied, forming two identical copies of each chromosome.
- In mitosis, the nucleus divides. One set of chromosomes is pulled to each side of the cell.
- In cytokinesis, the cytoplasm and cell membrane divide, forming two genetically identical daughter cells.
14
Q
A
