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Discussion and Debate
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Physical & Life Sciences
Creation & Evolution
Evolution Lesson
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<blockquote data-quote="Ophiolite" data-source="post: 70855279" data-attributes="member: 234799"><p>My understanding is it is as you have described. Think of it this way. Genes that are useful tend to be spread through a population and become normal, or at least common. Genes that are disadvantageous tend to be eliminated from the population. </p><p></p><p>But in both cases these are tendencies. Disadvantageous genes may "hang around" for a considerable time if they are carried by individuals who have lots of really advantageous genes. And vice versa, when a beneficial mutation first occurs it may be eliminated early on by bad luck.</p><p></p><p>And, as we see in the case of pigmentation, advantageous genes in one environment may be a disadvantage in another. </p><p></p><p>My population genetics statistical skills are sorely lacking so I do not want to comment on how many generations a rare recessive gene might "hang around" before being expressed, but you have the principle down that it will do so for some considerable time.</p></blockquote><p></p>
[QUOTE="Ophiolite, post: 70855279, member: 234799"] My understanding is it is as you have described. Think of it this way. Genes that are useful tend to be spread through a population and become normal, or at least common. Genes that are disadvantageous tend to be eliminated from the population. But in both cases these are tendencies. Disadvantageous genes may "hang around" for a considerable time if they are carried by individuals who have lots of really advantageous genes. And vice versa, when a beneficial mutation first occurs it may be eliminated early on by bad luck. And, as we see in the case of pigmentation, advantageous genes in one environment may be a disadvantage in another. My population genetics statistical skills are sorely lacking so I do not want to comment on how many generations a rare recessive gene might "hang around" before being expressed, but you have the principle down that it will do so for some considerable time. [/QUOTE]
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