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<blockquote data-quote="Fishalt" data-source="post: 65141" data-attributes="member: 228"><p>This is what I mean, Plunkett. You're still not understanding how it works.</p><p></p><p>Animals breed and produce offspring. These may have genetic mutations, they may not. If they do have mutations, these might accrue those offpsring a survival advantage or they may not. In fact it's likely only a decimal point of offspring born with a mutation see any benefit from this. The vast, vast majority of mutations will have no meaning at all. Some will offer only a survival disadvantage--and these mutations will be weeded out by environmental forces.</p><p></p><p>Let me give you an example:</p><p></p><p>Let's say you have a species of moth that feeds on the foliage of a certain type of bush. This moth is predated by birds. Now let's say a mutation emerges in that moth population that causes produces a generation of moths that is very, very slightly more like the colour of the foliage of the bush.</p><p></p><p>Both the ordinary moths and the moths that carry the mutant gene will still get predated by birds quite a lot. Most will die. But it's likely that the moths with gene that makes them slightly more like the foliage of the leaves will get eaten slightly less, because they are slightly less easy to see by predating birds due to camuoflage. What this then means is that the mutant moths are more liekly to breed in greater numbers, which in turns means the mutated gene is passed on at a higher rate than the non-mutated moths. Eventually, that species of moth will all carry the mutant phenotype. This process will continue, all thye time accentuating the mutation until such a time some other mitigating environmental factor puts a stopper in it.</p><p></p><p>Does this make sense?</p></blockquote><p></p>
[QUOTE="Fishalt, post: 65141, member: 228"] This is what I mean, Plunkett. You're still not understanding how it works. Animals breed and produce offspring. These may have genetic mutations, they may not. If they do have mutations, these might accrue those offpsring a survival advantage or they may not. In fact it's likely only a decimal point of offspring born with a mutation see any benefit from this. The vast, vast majority of mutations will have no meaning at all. Some will offer only a survival disadvantage--and these mutations will be weeded out by environmental forces. Let me give you an example: Let's say you have a species of moth that feeds on the foliage of a certain type of bush. This moth is predated by birds. Now let's say a mutation emerges in that moth population that causes produces a generation of moths that is very, very slightly more like the colour of the foliage of the bush. Both the ordinary moths and the moths that carry the mutant gene will still get predated by birds quite a lot. Most will die. But it's likely that the moths with gene that makes them slightly more like the foliage of the leaves will get eaten slightly less, because they are slightly less easy to see by predating birds due to camuoflage. What this then means is that the mutant moths are more liekly to breed in greater numbers, which in turns means the mutated gene is passed on at a higher rate than the non-mutated moths. Eventually, that species of moth will all carry the mutant phenotype. This process will continue, all thye time accentuating the mutation until such a time some other mitigating environmental factor puts a stopper in it. Does this make sense? [/QUOTE]
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