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

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