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Thread: random genetic variation

  1. #1 random genetic variation 
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    Is all genetic variation random?


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  3. #2  
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    no not really what happens is that there are dominent and resesive genes and each DNA "block" has a combination of the two DD, DR, or RD if you have a D you have the dominant gene so you have a gene to be short or tall tall bieng the D DD= tall DR= tall RD= tall RR=short so your mom has DR or RD and your dad has DR or RD you can get RR resulting in a gene variaion that could seem like it came out of no where.


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  4. #3  
    Moderator Moderator TheBiologista's Avatar
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    Quote Originally Posted by Topalk
    no not really what happens is that there are dominent and resesive genes and each DNA "block" has a combination of the two DD, DR, or RD if you have a D you have the dominant gene so you have a gene to be short or tall tall bieng the D DD= tall DR= tall RD= tall RR=short so your mom has DR or RD and your dad has DR or RD you can get RR resulting in a gene variaion that could seem like it came out of no where.
    Dominance and recessiveness have nothing to do with genetic variation- they influence phenotype, not genotype.
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  5. #4  
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    ah well I'm an 8th grade so I know al that I need to know.
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  6. #5 random genetic variation 
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    I should be more specific. Is all MOLECULAR genetic variation random?
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  7. #6  
    Universal Mind John Galt's Avatar
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    I don't understand the question. Genes are portions of molecules of DNA. So genetic variation is molecular variation. As such it is not truly random since some outcomes will be inhibited and others encouraged by chemistry.
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  8. #7  
    Forum Professor jrmonroe's Avatar
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    Could it be said that, yes, all molecular genetic variation is random, but that the survivability and fertility of specific individuals is another question?
    Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
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  9. #8  
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    You could say it, but you would be wrong. Here is a thread that addresses this question.

    http://www.thescienceforum.com/viewt...=24306&start=0
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