• Question: hi Yinka, how does a certain genetic trait that a Childs parents give them deteriorate as that child has a child, then that child has a child. how long would it take fore that genetic trait to deteriorate,or if possible mutate?

    Asked by 925genm52 to Yinka on 15 Mar 2018.
    • Photo: Yinka Abejide

      Yinka Abejide answered on 15 Mar 2018:


      For a gene responsible for genetic trait to deteriorate or mutate, it will take about a 1000 years from the present to a million years to do so. Some factors have been shown to enhance certain mutation of genetic traits in humans. One of them is the environment; that is, exposure to radiation. This could lead to death, extinction or other deleterious effects. In some other cases, the mutation could lead to a great improvement in the population. An example of negative effect of genetic trait is the black rocket mouse; https://modeling-natural-selection.wikispaces.com/how-long-does-it-take-for-a-mutation-to-become-prevalent.
      Positive effect of a genetic trait could occur in natural selection as when a recessive gene fades out from a population and therefore can not reproduce offspring with the required allele.