Re: Y versus y or who is the mutant
- To: hosta-open@mallorn.com
- Subject: Re: Y versus y or who is the mutant
- From: h*@open.org
- Date: Fri, 23 Mar 2001 19:27:17 -0800 (PST)
Ben:
>Y is the mutated less functional gene and y is the wildtype gene
>for green
I said that the yelow leaf gene is probably an inhibitor gene and it
is NOT in the chlorophyll synthesis pathway. The "Y" allele is the
dominant functional gene that is active and inhibits chlorophtyll
synthesis. The "y" allele is the recessive non-functional gene.
If you want to assume that the yelow leaf gene is a gene in the
chlorophyll synthesis pathway, then the YY or Yy genotype would
produce a green leaf and the yy genotype would produce a yellow leaf
because it would stop chlorophyll synthesis because it could not take
a precursor and convert it to the next compound in the pathway.
The yellow leaf gene is a dominant gene and dominant genes are usually
considered to be genes that produce a functional enzyme.
Joe Halinar
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