chuinhen Posted October 1, 2006 Share Posted October 1, 2006 typically , prokaryotes do not undergo mitosis !!!! is it true ???? and how are them goin to reproduce ???? Link to comment Share on other sites More sharing options...
Mokele Posted October 1, 2006 Share Posted October 1, 2006 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 Link to comment Share on other sites More sharing options...
CharonY Posted October 1, 2006 Share Posted October 1, 2006 Just a thought, is it possible that you mean meiosis? This would be true, of course. Link to comment Share on other sites More sharing options...
chuinhen Posted October 3, 2006 Author Share Posted October 3, 2006 if it is meisosis , then y it is so ??? Why prokaryotes cannot undergo meiosis ? Link to comment Share on other sites More sharing options...
Skye Posted October 3, 2006 Share Posted October 3, 2006 Because they reproduce by mitosis. Link to comment Share on other sites More sharing options...
JHAQ Posted October 3, 2006 Share Posted October 3, 2006 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 . Link to comment Share on other sites More sharing options...
CharonY Posted October 3, 2006 Share Posted October 3, 2006 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. Link to comment Share on other sites More sharing options...
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