Question

How does meiosis I differ from meiosis II?
A.

The homologous chromosomes pair up during meiosis II but not during meiosis I.

B.

Two sex cells are produced as a result of meiosis II but not as a result of meiosis I.

C.

The sister chromatids separate during meiosis I but not during meiosis II.

D.

Chromosome number decreases by half as a result of meiosis I but not as a result of meiosis II.

Answer 1

I think its D

Answer 2

what do u say @deepika.comet ?

Answer 3

gave you a medal.... so i say you are right....:)

Answer 4

oh yes..!!

Answer 5

why cant it be C

Answer 6

What do u say @Somy ?

Answer 7

do sister chromatid get separated in meosis I @deepika.comet ?

Answer 8

yeah no so actual reduction takes place in anaphase II im having a doubt in this when will the exact reduction divisiontakes place...? @Abhisar

Answer 9

D i think

Answer 10

i think separation of sister chromatids take place in continued mitosis.

Answer 11

Or Meiosis II @Somy

Answer 12

see exhange of chromosomes takes place in meiosis I [prophase I] but when will the exact reduction takes place resulting in hapliod cells

Answer 13

sister chromatids separate in both meiosis 1 and 2

Answer 14

then will will reduction of chromosomes takes place @somy

Answer 15

yes it will

Answer 16

no she meant when will

Answer 17

It will take place in M I

Answer 18

m i correct ?

Answer 19

yes but it will reduce twice actually saying

Answer 20

wait let me check

Answer 21

Yes it will be in M I

Answer 22

reduction division takes place in M I, in M II its only homotypic division which does not effect the chromosome number

Answer 23

yes @abhisar is correct M I shows reduction of chromosomes and the MII is similar to mitotis division

Answer 24

then the M I gives hapliod from diploid and M II gives hapliod only [ resembling mitosis]

Answer 25

father + mother
23 + 23 = 46 (crossing over)
46/2= 23 each of the 2 cells produced
then in these two cells
23*2= 46
then 46/2= 23 further 2 cells

Answer 26

so basically saying reduction division happens twice in both 1 and 2 meiosis

Answer 27

does autosomes participate in meiosis..?

Answer 28

this is basically whats happening with number of chromosomes
i don't really know which one to consider as 'reduction'

Answer 29

ok reduction never occurs in both stages if so it results in chromosomes with reduced hapliods also..

Answer 30

why did you multiply with 2 there

Answer 31

because this happens
the make a copy of genetic info which is from parents and then divide again

Answer 32

http://www.youtube.com/watch?v=rqPMp0U0HOA
i don't know what im saying already so just watch this

Answer 33

Thankyou so much @Somy & @deepika.comet for ur help and support \(\huge\ddot\smile\)