ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Biology => Topic started by: Highacheiver on October 22, 2012, 09:15:32 pm
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Hey guys,
i was just wondering if you were asked to list differences between natural and artificial selection, what differences you would go for?
i think i would lean towards the obvious one that natural selection has the phenotype selected by the environment whereas in artificial selection, humans chooses the phenotype selected for
Would another one be that natural selection is unpredictable whereas artificial isnt?
Or that natural selection chooses the phenotype that makes population more genetically fit whereas artificial selection may not produce offspring that make the population more genetically fit and more suited to environment but is what ever benefits humans?
This probably doesnt make sense but answers would be much appreciated! :)
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Q) Compare artificial selection with natural selection.
Natural selection is the action of selection pressures on species living in the
wild where individuals with the highest survival rates to sexual maturity will
make the greatest contribution to the gene pool of subsequent generations.
Artificial selection, on the other hand, is when humans deliberately select
specific individuals from a species that have a particular trait, to be the parents
of subsequent generations. The selected trait might have no survival value to
the individual and is only important to the humans that have selected it.
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Would another one be that natural selection is unpredictable whereas artificial isnt?
I don't think this is necessarily a good one.
Say you keep applying a single antibiotic (Tuberculosis treatment uses multiple drugs [~4] for a reason), what do you think is likely to happen?
Do you think its more likely the bacteria evolve to glow green or evolve resistance?
It's not necessarily unpredictable. So, i don't think this is a good way to differentiate them.
Or that natural selection chooses the phenotype that makes population more genetically fit whereas artificial selection may not produce offspring that make the population more genetically fit and more suited to environment but is what ever benefits humans?
This is a great one! Think about little dogs, we've bred using selective breeding. Little ones like beagles or pomeranians.
(http://www.allanimalsites.com/news/gallery/beagles/beagles_3.jpg)
(http://www.dogbreedinfo.com/images21/Pomeranianommania%20PoetryInMotionandPommaniaMsDynamite.jpg)
The ancestor of our dogs looked a little more like this:
(http://www.bluecanyonproductions.com/images/WITHERING-wolf-bearing-teeth.jpg)
Tell me which one is more fit hey ;) ?
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Q) Compare artificial selection with natural selection.
Natural selection is the action of selection pressures on species living in the
wild where individuals with the highest survival rates to sexual maturity will
make the greatest contribution to the gene pool of subsequent generations.
Artificial selection, on the other hand, is when humans deliberately select
specific individuals from a species that have a particular trait, to be the parents
of subsequent generations. The selected trait might have no survival value to
the individual and is only important to the humans that have selected it.
hahaha word for word from the 2007 lisachem unit 4 trial exam question 7)c) :P
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lol ;D
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thanks guys! :D
and good luck for bio on friday!