Cell Divsion Flashcards
describe the difference between mitosis and meiosis
- mitosis produce 2 meiosis produces 4
- mitosis identical whereas meiosis produces gentically differences
- mitosis produces a diploids wheresas meiosis produces a haplioids gamates
what are the 3 stages of cell division
- interphase
- mitosis
- cytokinesis
what is the longest stage of cell divison
interphase
what are the 4 stages of mitosis
prophase
metaphase
anaphase
telephase
describe the interphase stage
- dna doubles
- protein syntheis
cells organells also doubles - ATP contents
evidence of interphase
-chroomsomes are not visible
nucleous is visible
describe the stage of prophase
- chroomsomes are thicken and shorten
- centrioles moves to opposite side
- nuclear membreanes break down
evidence of prophase stage
chroomsomes are visble
nuclear membranes broken down
describe the stages of metaphase
spindle fibres forms
chroomsomes moves to the euqators
describe the stage of anaphase
centromere + sister chromatodes are seperated
describe the stage of telephase
chromatides moves to oppsites side
beign to recoil
what is cytokensis stage
reformtation of membranes
spliting of cytoplasms in to 2
descirbe what is meiosis
1st meiotic division- seperates each homologus pairs
2nd divison - seperates chromatides of each chroomsomes
meiosis are gentically diffeence due to 2 processs
- independant segragation
- crossing over
describe what is independant segregation
- different combination of paternal and maternal chroomsomes are randomly seprated
