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Prokaryotes/Eukaryotes and reproduction

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Prokaryotes/Eukaryotes and reproduction

Postby student12 » Thu Jun 22, 2006 12:02 pm

Is there a relationship between prokaryotes and eukaryotes in reagards to its cell reproduction?
In other words does all prokaryotes reproduce asexually?
And eukaryotes reproduce sexually?
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Postby GreenDog » Thu Jun 22, 2006 12:52 pm

You are mixing some stuff…
Prokaryotes reproduce asexually by dividing. But some of them have mechanisms of gene exchange which can be viewed like sort of sexual reproduction.
Eukaryotes often reproduce sexually, when they are part of a complex organism. Unicellular eukaryotes also reproduce asexually in a way similar to prokaryotes and also have gene exchange mechanisms.
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Postby majik1213 » Fri Jun 30, 2006 1:04 pm

like GreenDog said, it is not the case that all prokaryotes reproduce asexually. Consider conjugation as a counterexample to your question. Conjugation is not a form of sexual reproduction; it is a form of genetic recombination. Remember, sexual reproduction requires the union of a male and female gamete. In conjugation, all you have is the pilus connecting the two bacteria, followed by a transfer of replicated DNA. There is no fertilization because no gametes form. Thus, conjugation is clearly not a form of sexual reproduction. It is important to realize that, although not all prokaryotes reproduce asexually, there are no known bacteria that reproduce sexually.
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