Thread: Pics of *good* Paperwhites
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Old 11-10-2012, 08:08 PM   #222
meeera
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Quote:
Originally Posted by HarryT View Post
That's what colour blindness is. The development of photoreceptors in the eye is controlled by a gene in the X-chromosome. If the gene is faulty, some or all of these colour sensors fail to develop correctly.
llcj might be talking about tetrachromacy
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