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RE: RE: The state of my vision

by extremely (Priest)
on Oct 19, 2000 at 12:36 UTC ( #37478=note: print w/replies, xml ) Need Help??

in reply to RE: The state of my vision
in thread The state of my vision

Neither eyesight or eyecolor are sex-linked. No help there I'm afraid. The only sex-linked vision problem I've heard about is chromatic, i.e. color-blindness. One or two of the color-blindness forms seem to be at least partially based on the X having a regressive that your Y can't block because the branch that expresses that blocking gene is missing.

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RE: RE: RE: The state of my vision
by chromatic (Archbishop) on Oct 19, 2000 at 19:12 UTC

    While I do *have* red-green colour-blindness, that is hardly my defining characteristic.

    At least you didn't capitalize it, though. :)

      Oh man you have no idea the internal struggle I went thru to not bracket your name when typing that post =P I left the post window open for a minute while I fought the impulse...

      $you = new YOU;
      honk() if $you->love(perl)

RE: RE: RE: The state of my vision
by hil (Sexton) on Oct 21, 2000 at 02:18 UTC

    You're right - red-green color blindness is a flaw in a gene on the X chromosome. This is why there are so many men with the condition but so few women. A woman has two X chromosomes, and so would have to get two flawed copies of the gene.

    Men only get one chance.

    Let's hear it for redundancy!

    Vision can vary greatly amoung family members because much of vision quality is environmental. Not to say that genetics aren't important. Unfortunately, vision degrades when you abuse it. But happily, contacts aren't that bad. {grin}

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