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Does anyone know how much of evoloution is based off random mutation? Like what percentage of changes are postulated to be from mutations?
All of evolution is BASED on random mutaions. Natural selection then selects the best fit out of the mutants. Sciences experience with clones (genetically identical organisms, such as bacteria) seems to indicate that genes control phenotype and responses to environment. For instance, would you expect identical twins (genetic clones) to differ greatly from one another, physically? I would argue that they would not. I would argue that people with different genetic content would vary, and they do.
So yes, evolution is based on mutations, with natural selection guiding the end result.
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