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Re: Re: Debbie Rairdon

In a message dated 12/31/00 11:40:07 AM Mountain Standard Time, 
irischapman@netscape.net writes:

 A good thought. When I look at photos of DR it would apear to be a 
 pale yellow, and could also have the Recessive reduced Carotine genes, 
 thus the yellow could be flavenoid based? Walter thought that it was a 
 bee pod, in which case selective recall or a bee visiting more then 
 one flower could account for it.

The table in TWOI shows that Debbie Rairdon has several xanthophylls (yellow 
pigments) derived from the beta-carotene pathway, although it was not tested 
for specific carotenes.  

Lycopene is associated with the alpha-carotene pathway.  Thus, the presence 
of a dominant beta-carotene inhibitor in both parents, or the hypothesized 
"switch" governing the carotene pathways, could explain the surprising 
appearance of DR.  

I did not mean to suggest that this is KNOWN to be the case.  It's just a 
possibility based on known genetic factors.  A visiting bee would change the 
picture entirely!

Sharon McAllister

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