Summary
Summary Meiosis
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Includes: -meiosis in cell cycle -phases with illustrations and analysis -when meiosis goes wrong -polyploidy
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EI I SISA form of reduction devision
Process whereby one diploid cell is divided into 4 haploid cells
46 D sematic cells
22 pairs 2 sex chromosomes
Cells are diploid or 2n
Gametes sex cells Spermtegg are haploid or
halfnumberof chromosomes 23 human
n stfaticcells diploid
cells
zz autosomes I gonosome
only in sex organs Human testesoveries planeanthersloveries
Somatic cells in
sex organ diploid
1
Meiosis
Haploid n Haploid n
Ooumcegg sperm
t
gonosome
healthy normal
diploid cells making
thebody
Not Gonosomes sex chromosomes
are either I called X or Icalled 4
Female ZX XX
MALE8 IX and I Y XY
, In a cell in sexorgan to formGametes
In a symatic cell
mitosis G G
g Begg S
G
1 Prophase
2 Metaphase
oMeiosis 2 Stages
3 Anaphase
4 Telephase I meiosis one
1 Prophasel
2 metaphaseI
3 Anaphase
4 Telephase
2 Meiosis two
1 Prophase2
2 Metaphase2
3 Anaphase z
o
by the end 4 44 gaÉÉ get
During meiosis 2 procecessoccur increasinggeneticveraition
1crossingover prophaseD
2 Random assortment metaphase metaphases
End of meiosis 182 daughtercells x identical
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