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Author Topic: Why is natural selection so much slower than human-led selection?  (Read 14810 times)

Offline Variola

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SOOOOOooooh,

on topic: Natural selection is much slower than human selection because natural selection occurs at random, and human selection has some reasoning and purpose behind it.


That is what i said 2 pages ago!!

Quote
Ontopic- humans select to produce what is beneficial for us, not for the plant/animal,whereas evolution does the opposite.

http://www.thenakedscientists.com/forum/index.php?topic=25519.0

Pffffttttttt :P :P :P
 

Offline BenV

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Ontopic- humans select to produce what is beneficial for us, not for the plant/animal,whereas evolution does the opposite.

http://www.thenakedscientists.com/forum/index.php?topic=25519.0

Also, most evolutionary changes are a trade off of sorts - we can control for the disadvantageous factors (maybe bigger, sweeter fruit will be less fertile - in the wild this can kill your species, in a greenhouse it's simply a case of marginally more care and more seed planting.

Artificial selection certainly isn't perfect - many breeds of dog/cat have horrendous arthritic/kidney failure problems that their hybridised, mongrel or wild cousins don't experience.  Because we can cope with these problems (or don't care, and just want the fluffiest poodle) we strengthen certain selection pressures whilst relieving others.
 

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