Meiosis
mm
living by reproduction
reproduce sexual
o rganisms
amalecellspermandfemalecellovumwithone
setofchromosomesinjointomakealargercell zygotern
diploidrn twosetsofchromosomes146pairs
haploid setofchromosomes aspairs
n one
meiosis the
halves amountofchromatinto set
giveasingle ofchromosomes
reductiondivision
aremade
gametes
Theprocessotreauctionaivision
interphasethe
during Dna
cell's replicates thereare Dnamoleculesineachchromosome
two
has
eachchromosome twoi dentical
areheldtogetherbyacentromere
which
chromatids
eachchromosomeisdoublestranded
Meiosis 1
prophase l
s visible
chromosomescondence become
similarinstructureasize
which
chromosomes are uptoformhomologouschromosomes
pair
one
chromosome
beingmaternalxtheother paternal
both
carry for
g enes thesamecharacteristic
nucleolus
begins fade
to
inanimalcellsthecentriolesseparateamovetooppositeendsofcell makespolesin s
inplantcellsthe just
poles appearat endsof
opposite cell
r a centriolesmoving
nucleolus tooppositeends 10 atpoles
arrive
centrioles
K
nucleolus
A
fading
homologous
a
tangled
chromosome
chromosomes
pair
y Fi 10
thechromosomesshortenandhomologouspairsformtomakebivalents
madeoffourchromatids
eachbivalentis twopaternal twomaternal
stick
paternalamaternal t ogetherat ta
calledchiasma
points
atchiasmatathe may
chromatids breakajoin with thehomologouschromatid intoisswapped
genetic
over
crossing
eachchromatidinthe
bivalent
may begeneticallydifferentfromthe
now others
taintroducesgeneticvariation
chiasma
, non recombinantchromatids chromatidsthatdon'tcrossover
recombinantc hromatids chromatidsthatcrossover
nuclear
membrane chiasmata
fading
fl y holding
chromosome
together
a
Formationotchiasmata
Metaphase I
bivalentslineup theequator
along
bytheircentromeres
attachtospindlefibres
they
o pole
É
bivalentheld
together abivalent
atcentromere
equator chromatids
centromeresattached
over
crossing happens
tospinaletibres
Double
stranded
chromosomes
Anaphase
spindlefibres
shorten
strandedchromosomesare
double pulled from
away their partnerto
bivalent poles
opposite
shorten
spindlefibres
the
topull chromosomes
tothepoles
thedouble
s trandedchromosomes
movetothepoles
Telophase
thedoublestrandedchromosomes
when arriveatpolesthenuneaireappearathenuclearmembranetormsarounaeaongroup
spinaletibresaissapear
mm
living by reproduction
reproduce sexual
o rganisms
amalecellspermandfemalecellovumwithone
setofchromosomesinjointomakealargercell zygotern
diploidrn twosetsofchromosomes146pairs
haploid setofchromosomes aspairs
n one
meiosis the
halves amountofchromatinto set
giveasingle ofchromosomes
reductiondivision
aremade
gametes
Theprocessotreauctionaivision
interphasethe
during Dna
cell's replicates thereare Dnamoleculesineachchromosome
two
has
eachchromosome twoi dentical
areheldtogetherbyacentromere
which
chromatids
eachchromosomeisdoublestranded
Meiosis 1
prophase l
s visible
chromosomescondence become
similarinstructureasize
which
chromosomes are uptoformhomologouschromosomes
pair
one
chromosome
beingmaternalxtheother paternal
both
carry for
g enes thesamecharacteristic
nucleolus
begins fade
to
inanimalcellsthecentriolesseparateamovetooppositeendsofcell makespolesin s
inplantcellsthe just
poles appearat endsof
opposite cell
r a centriolesmoving
nucleolus tooppositeends 10 atpoles
arrive
centrioles
K
nucleolus
A
fading
homologous
a
tangled
chromosome
chromosomes
pair
y Fi 10
thechromosomesshortenandhomologouspairsformtomakebivalents
madeoffourchromatids
eachbivalentis twopaternal twomaternal
stick
paternalamaternal t ogetherat ta
calledchiasma
points
atchiasmatathe may
chromatids breakajoin with thehomologouschromatid intoisswapped
genetic
over
crossing
eachchromatidinthe
bivalent
may begeneticallydifferentfromthe
now others
taintroducesgeneticvariation
chiasma
, non recombinantchromatids chromatidsthatdon'tcrossover
recombinantc hromatids chromatidsthatcrossover
nuclear
membrane chiasmata
fading
fl y holding
chromosome
together
a
Formationotchiasmata
Metaphase I
bivalentslineup theequator
along
bytheircentromeres
attachtospindlefibres
they
o pole
É
bivalentheld
together abivalent
atcentromere
equator chromatids
centromeresattached
over
crossing happens
tospinaletibres
Double
stranded
chromosomes
Anaphase
spindlefibres
shorten
strandedchromosomesare
double pulled from
away their partnerto
bivalent poles
opposite
shorten
spindlefibres
the
topull chromosomes
tothepoles
thedouble
s trandedchromosomes
movetothepoles
Telophase
thedoublestrandedchromosomes
when arriveatpolesthenuneaireappearathenuclearmembranetormsarounaeaongroup
spinaletibresaissapear
