Dominant, recessive, sexual selection

  1. honestrosewater

    honestrosewater 2,330
    Gold Member

    (Actually, perhaps I should have dropped the sexual selection part from the title.)

    Okay, stupid question that I'm curious about but don't know how to ask: Does anyone know whether there's any connection between a trait being dominant or recessive and a trait being preferred by mates?
    That is, is it ever clear that something analogous to the following occurs: Say monkeys have a dominant trait T and a recessive trait t. The tt monkeys tend to choose other tt monkeys. And maybe TT monkeys prefer TT or Tt monkeys? Or maybe TT monkeys don't show a preference, but tt monkeys do. Or something - anything - like that.
    What might be going on in these situations, if they did happen? It seems like this would be a case where organisms can compare parts of their DNA to each other, looking for a match that would best preserve their own DNA. That is, for instance, two tt parents produce tt offspring. tt and TT parents produce Tt offspring. So two tt parents getting together better preserves each parent's genes. ?? I realize it may not be that simple, but I don't know how much more complex it is. This is just stuff I remember from high school biology class.
     
    Last edited: Sep 13, 2005
  2. jcsd
  3. Ouabache

    Ouabache 1,323
    Science Advisor
    Homework Helper

    I am not aware of any scientific studies or statistics that suggest this trend. An example of what you are inquiring could be: those with blond hair preferring mates who also have blond hair.

    Of course genetics is not limited to the animal kingdom. In Mendel's peas white flowers are recessive. In pollination by insects, the pollen from a white flower is not spread preferentially to other white flower pistils. They have an equal likelihood of reaching a red or purple flower.
     
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