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Name: Rob Courtney
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Question:
It is an accepted fact that all life on Earth began as one-celled organisms that reproduced asexually, with all offspring identical to the parent from which they were created. My question is, if all offspring are identical to their parents, then is there any room for advancement? How did life ever evolve past this primitive state if no changes are made? Thank you.



Replies:
Genetic mutations still occur due to chemical and radiation effects.

--- jade


By mutation. Since all cells, in a way, in these organisms are in the germ line, i.e. they pass mutations on to their offspring, then every mutation event lives on. In sexually reproducing organisms, only mutations in eggs and sperm will get passed on. Also, by breakage and recombination-like events during cleavage.

-Profbill



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