mitosis and meiosis Flashcards
1
Q
two types of animal cells that undergo division
A
somatic cells (body cells that are not sex cells) and gamete cells(sex cells)
2
Q
what is mitosis
A
process of cell division in which a cell splits to produce 2 genetically identical daughter cells with 46 chromosomes each, the same as the parent cell. meaning they are diploid cells because they have sets of chromosomes.
3
Q
what is meiosis
A
process of cell division that results in 4 haploid (having one set of chromosomes) daughter cells that are all genetically unique. each cell has 23 chromosomes, half that of the parent cell.
4
Q
stages of mitosis
A
- interphase - cell grows. dna replicates
- prophase - dna condenses into chromosomes. nucleus disappears
- metaphase - chromosomes become visible and align at the equatorial plate
- anaphase - chromosome pairs separate
- telophase - 2 nuclear membranes form
- cytokinesis - cytoplasm splints
5
Q
stages of meiosis
A
- interphase - cell grows. dna replicates
- prophase - dna condenses into chromosomes exchange genetic information through crossing over. nucleus disappears.
- metaphase - chromosomes become visible and align at the equatorial plate
- anaphase - chromosome pairs separate
- telophase - 2 nuclear membranes form
- cytokinesis - cytoplasm splints
- interphase2 - cell grows. dna does NOT replicate
- prophase2 - chromosomes condense again
- metaphase2 - chromosomes line up at the equatorial plate
- anaphase2 - chromatids split
- telophase2 - nuclear membrane forms. chromosomes decondense
- cytokenesis2 - cells split. 4 daughter cells
6
Q
mitosis and meiosis differences
A
mitosis 5 stages(not including interphase) Somatic cells 2 diploid daughter cells Chromosome number stays the same For growth and repair meiosis 10 stages(not including interphase) Gamete cells 4 haploid daughter cells Chromosome number is halved For sexual reproduction
7
Q
mitosis and meiosis similarities
A
Type of cell division Produces more cells One parent cell Similar stages Chromosomes line up in the middle before being pulled apart