no mitosis for prokaryotes ???

[chuinhen]

typically , prokaryotes do not undergo mitosis !!!!

 

is it true ????

 

and how are them goin to reproduce ????

[Mokele]

It's not true, prokaryotes divide just like eukaryotes. They've got a few differences, what with the cell wall and having circular chromosomes, and a few extra tricks, like mature cells exchanging plasmids, but those are minor.

 

Mokele

[CharonY]

Just a thought, is it possible that you mean meiosis? This would be true, of course.

[chuinhen]

if it is meisosis ,

then y it is so ???

 

Why prokaryotes cannot undergo meiosis ?

[Skye]

Because they reproduce by mitosis.

[JHAQ]

Mitosis is regular cell division which preserves the double helix as is . Meiosis which also involves recombination , cross overs & some genetic re shuffling is in reproductive germ cells only spliiting the double helix to produce a haploid entity which the fertilises another haploid entity to produce a zygote . A non - sexual prokaryote just divides as is with genetically identical offspring . Its biggest biological drawback is invariance in offspring . Sex allows for far greater variability in offspring for the selctive action of the environment to work on . Its price is eventual death of the originating parent .

[CharonY]

Maybe putting it a bit simpler, organisms that do meiosis have (at least) a diploid genome, meaning they posses two sets of a given chromosome (one from each parent). During meiosis the pair is split and the offspring will only get one pair (and the other one from the other parent).

 

Prokaryotes only posses on chromosome which is replicated and given to the daughter cell asexually. Therefore there is no need (or possibility) to split chromosome pairs.