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Boy born with extra strand of DNA. watch

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    (Original post by Retrodiction)
    You know how some human offspring are just naturally faster runners than their parents? Or naturally more orally skilled? Or have naturally faster reactions? Since all physiology is grounded in genetics, it stands to reason that the superior abilities of such offspring are the result of genetic mutations. Thus, mutations with beneficial effects are common.
    Not really. Traits such as being a faster runner are multifactorial, depending on a number of different genes as well as environmental factors. The child inherits two versions (alleles) of each of those genes, one from each parent (with each parent giving one of their two alleles). So, very roughly speaking, a child could be a better runner than both his parents because he happened to inherit the right combination of genes, a combination that neither of them had.
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    (Original post by Mbob)
    Not really. Traits such as being a faster runner are multifactorial, depending on a number of different genes as well as environmental factors. The child inherits two versions (alleles) of each of those genes, one from each parent (with each parent giving one of their two alleles). So, very roughly speaking, a child could be a better runner than both his parents because he happened to inherit the right combination of genes, a combination that neither of them had.
    You're just reinforcing my point? The information referred to with regards to DNA isn't just amino acids and proteins... new information can obviously arise from different combinations of base pairs in the sequence.
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    (Original post by Retrodiction)
    You're just reinforcing my point? The information referred to with regards to DNA isn't just amino acids and proteins... new information can obviously arise from different combinations of base pairs in the sequence.
    You had said that the superior athletic abilities of a child compared with their parents is a result of a mutation, and that this was evidence that beneficial mutations are common. I was pointing out that this alone is not evidence for mutations, since this could happen even if there were no mutations. Similarly, natural selection and even evolution can occur without mutations providing there is a sufficient variety of genetic material available within the population so start with.

    The evidence for beneficial mutations lies elsewhere.
 
 
 
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