cells Flashcards
1
Q
Body cells are also called ..?
A
Somatic cells
2
Q
Mitosis
A
- The division of somatic cells which results in growth
- a mother cell divides into 2 identical daughters cells
3
Q
Chromosomes
A
- thread like structures found in the nucleus of virtually all cells
- transfer hereditary characteristics from generation to generation
- made up of DNA and histones
- 46 chromosomes in a human cell
4
Q
Replication
A
The duplication of genetic material
5
Q
The cell cycle
A
- period during which the cell grows,replicates genetic material and divides
6
Q
IMPAT
A
- interphase, prophase, metaphase, anaphase, telophase
7
Q
Interphase
A
- period between 2 consecutive cell divisions
- cell growth and DNA replication take place
8
Q
Prophase
A
- chromtin network condenses ; threads become visible as chromosomes
- centrioles move to opposite poles of cells
9
Q
Metaphase
A
- (middle)
- chromosomes move the equator and arrange themselves in a single row
- spindle fires attach to centromere
10
Q
Anaphase
A
- (away)
- centromere on each chromosome divides into 2
- 2 chromatids separate from each other a d more opposite poles
- cytokinesis starts
11
Q
Telophase
A
- chromosomes arrange themselves at the poles
- spindle fires dissappear
- cytoplasm divides, invagination occurs
- cytokinesis is complete and 2 daughter cells are formed
12
Q
Karyokinesis
A
- division of nucleus and chromosomes
13
Q
Cytokinesis
A
- division of cytoplasm,organelles and cell membrane
14
Q
Purpose of mitosis
A
- to ensure that organism grows and increases in size
- ensure that worn out and damaged cells are replaced and repaired
- for asexual reproduction e.g bacteria
