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<blockquote data-quote="AdamJames" data-source="post: 1765386" data-attributes="member: 459333"><p>Does that mean she <em>is</em> saying that recent genetic changes are a factor in obesity? I think I need to read up on her views as I still think I'm not following. I'll do some reading in the next few days as this sounds interesting.</p><p></p><p>My own understanding of genetics probably stopped about 5 years ago so I may be behind the times.</p><p></p><p>I thought it was generally accepted that every time a new individual was produced, there will be copy errors in the DNA, some harmful, some beneficial, and some of no great importance. Apply a certain environment to those variations, such as a new food environment, and if one variant is more favourable to the gene's carriers in that environment then, over many many generations, that variant is likely to become the dominant one.</p><p></p><p>But I think genetic drift was thought to be a lot more prevalent than it was believed to be many decades ago, i.e. it is accepted that environmental pressures such as a harsh food environment are not always necessary for a certain set of genes to become more widespread than others.</p><p></p><p>None of these thoughts help me to understand what I may be missing about Genetic Woman's views and what the debate is, I definitely need to read up. If all she is saying is that genetic differences mean some people are more likely to become obese in a given food environment then that doesn't seem controversial to me. Quite the opposite in fact. If everyone performed exactly the same in a given food/temperature/climate/oxygen/anything environment then evolution has stopped working!</p></blockquote><p></p>
[QUOTE="AdamJames, post: 1765386, member: 459333"] Does that mean she [I]is[/I] saying that recent genetic changes are a factor in obesity? I think I need to read up on her views as I still think I'm not following. I'll do some reading in the next few days as this sounds interesting. My own understanding of genetics probably stopped about 5 years ago so I may be behind the times. I thought it was generally accepted that every time a new individual was produced, there will be copy errors in the DNA, some harmful, some beneficial, and some of no great importance. Apply a certain environment to those variations, such as a new food environment, and if one variant is more favourable to the gene's carriers in that environment then, over many many generations, that variant is likely to become the dominant one. But I think genetic drift was thought to be a lot more prevalent than it was believed to be many decades ago, i.e. it is accepted that environmental pressures such as a harsh food environment are not always necessary for a certain set of genes to become more widespread than others. None of these thoughts help me to understand what I may be missing about Genetic Woman's views and what the debate is, I definitely need to read up. If all she is saying is that genetic differences mean some people are more likely to become obese in a given food environment then that doesn't seem controversial to me. Quite the opposite in fact. If everyone performed exactly the same in a given food/temperature/climate/oxygen/anything environment then evolution has stopped working! [/QUOTE]
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