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Thread: Additional Filters, besides life/death/reproduction?

  1. #1 Additional Filters, besides life/death/reproduction? 
    Time Lord
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    I'm curious what other filters might exist in nature to help in evolution. The artificial insemination topics has been pretty interesting, by raising the question of whether the swimming competition between spermatozoa plays any kind of selective role or not. http://www.thescienceforum.com/viewt...asc&highlight=


    Another thing I wonder is if it is possible for an animal to simply produce different sperm/eggs depending on conditions they encounter after birth? Maybe based on different hormone levels in the body. I started another thread on that, but it didn't get any responses..... maybe I didn't pose the question very well.

    Since an organism's ability to adapt increases the more information they can take in for their environment, it would make a lot of sense to me if additional selection processes evolved, beyond the basic one (genes getting selected against solely by failure to reproduce successively). The species that is capable of more rapid evolution out adapts its peers over time, as we see in humans, where meme evolution has allowed us to overtake all the other species.....at least so far...


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  3. #2  
    Forum Masters Degree Golkarian's Avatar
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    What do you mean by different sperm/eggs? As in size, some other feature or a bias gene/chromosome shuffling during meiosis?


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  4. #3  
    Time Lord
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    Quote Originally Posted by Golkarian
    What do you mean by different sperm/eggs? As in size, some other feature or a bias gene/chromosome shuffling during meiosis?
    I'm wondering if the DNA it carries could be different. Maybe some chromosomes are more likely to be transferred from the host to a new spermatozoa when the blood flowing through your body has a different chemical content?

    It probably doesn't happen, but what I'm saying is that I don't see any reason why it couldn't.
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  5. #4  
    Forum Masters Degree Golkarian's Avatar
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    This might count as death but I was reading about a process called meiotic drive the other day. Essentially certain sperm are killed off if they contain certain alleles. Not sure how prevalent it is, though.
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  6. #5  
    Forum Junior
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    attractiveness to the opposite sex
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