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View Diary: My very first real life encounter with a Tea Partier (251 comments)

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  •  Check out the science (3+ / 0-)
    Recommended by:
    Angie in WA State, SuWho, Kimba

    of epigenetics.  You (and your environment) can influence your own biology.  It can turn genes on and off.  So, e.g., constant stress (unless you learn how to deal with it) can make physiological changes in your body and brain.

    I'm not expert, just been reading a bit.  But it's a fascinating new insight into the nature vs nurture debate.

    •  I'm very familiar with the activation (1+ / 0-)
      Recommended by:

      of otherwise inactive genes as a result of environmental factors. In other words, the same genotype can produce disparate phenotype.

      Of course, these are genes which already exist within the genome.

      I assure you, an individual with environmentally activated genes is in NO WAY another species from an individual in whom these genes have not been activated.

      Species is defined by genotype, not phenotype.

      Because I'm curious, if I were to cut off a frog's leg ( change in physiology due to environmental influence- I am part of the environment), is it not a frog anymore?

      •  "Different neurosystems" (0+ / 0-)

        is not a different species.

      •  To take things one step farther (0+ / 0-)

        Could some individuals be more susceptible than others to having these particular genes activated under adverse environmental conditions?  And if so, might the degree of susceptibility itself be heritable?  If it were, the degree of susceptibility itself could be subject to natural selection.  Then it becomes possible for populations to evolve greater tendencies to react in a particular way to environmental stress.

        FOX News: For entertainment purposes only. Not to be confused with actual news broadcasting.

        by IowaBiologist on Thu Feb 21, 2013 at 01:04:15 PM PST

        [ Parent ]

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