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Message: <blockquote data-quote="cotjones" data-source="post: 7663715" data-attributes="member: 573988">No, i'm saying that most changes in the phenotype due to mutation will be negative, meaning they will hurt not help. Technically, most genotype mutation are invisible and don't change the phenotype at all.  I think you are getting confused here, let me clarify.All positive and negative mutations are both phenotypic and genotypic. It has to be expressed in the phenotype to have either a negative or positive effect.Neutral mutations however could be EITHER only genotypic or both. The vast majority of the time these neutral mutations won't be expressed phenotype. They are also rare in nature because most traits are suited for the environment, so the selective factor on that trait has to be eliminated for the trait to evolve neutrally. IE (something with eyes being trapped in a cave.)</blockquote>

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