>I think that since the Hypos have so much variability within a litter between both heterozygous and homozygous forms, and since they contribute variably when combined with other mutations that the incomplete dominance label is fitting. Obviously in cases such as this, we are left to label the mutation the best way we can, and this is really only done for understanding on a common basis.

The variability when combined with other, independent mutants doesn't really count in the dominant-codominant-recessive classification. Salmon (Hypo) is obviously not a recessive mutant gene. Salmons have so much variability within a litter between heterozygous and homozygous forms that often they cannot be separated. That's why I think that salmon is better classed as a dominant mutant gene than a codominant mutant gene. I know that Rich Ihle called salmon an "incomplete dominant". I'd agree with him only if he can distinguish homozygous salmons from heterozygous salmons with 95% or higher accuracy and can teach others to do as well.

Codominant mutants and incomplete dominant mutants can only be distinguished with data showing whether or not there is a functional gene product. We have no such data for salmon and most other snake mutants; we only have breeding data. Breeding results are exactly the same for incomplete dominants and for codominants, making the terms synonyms at this level. My genetics prof used "codominant" as a catchall for all mutants producing this sort of breeding result because it has fewer characters to type than "incomplete dominant".

If he can't do a better job

Paul Hollander

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• co-dom vs. dominant - NUCCIZ_BOAS, Thu May 25 23:25:25 2006
• RE: co-dom vs. dominant - senorsnake, Thu May 25 23:48:26 2006
• RE: co-dom vs. dominant - Sharpman, Fri May 26 00:53:51 2006
• RE: co-dom vs. dominant - BNixon, Fri May 26 01:49:46 2006
• Brandon... - ChrisGilbert, Fri May 26 07:44:02 2006
• Chris.... - BNixon, Fri May 26 08:10:11 2006
• Correction... - ChrisGilbert, Fri May 26 07:41:19 2006
• Correction... - ChrisGilbert, Fri May 26 07:37:06 2006
• RE: co-dom vs. dominant - RyanHomsey, Fri May 26 10:53:23 2006
• RE: co-dom vs. dominant - snakehorse, Fri May 26 11:28:09 2006
• Excellent clarification - Thanks a bunch - RyanHomsey, Fri May 26 11:36:23 2006
• RE: co-dom vs. dominant - Paul Hollander, Fri May 26 13:01:19 2006
• Like you stated..... - rainbowsrus, Fri May 26 11:38:37 2006
• RE: co-dom vs. dominant - Paul Hollander, Fri May 26 11:59:38 2006
• RE: co-dom vs. dominant - metalpest, Mon May 29 18:43:39 2006
• RE: co-dom vs. dominant - Paul Hollander, Tue May 30 16:48:55 2006
• RE: co-dom vs. dominant - metalpest, Tue May 30 20:49:07 2006
• Ryan... - ChrisGilbert, Fri May 26 13:09:45 2006
• RE: Ryan... - Paul Hollander, Fri May 26 13:49:47 2006
• Typo ... - Paul Hollander, Fri May 26 13:51:40 2006
• Paul... - ChrisGilbert, Fri May 26 14:22:11 2006
• Chris ... - Paul Hollander, Fri May 26 14:55:16 2006
• Okay... - ChrisGilbert, Fri May 26 15:40:56 2006
• RE: Okay... - Paul Hollander, Fri May 26 18:14:09 2006
• I appreciate... - ChrisGilbert, Fri May 26 20:16:53 2006
• Journal of Genetics Article by Rich Ihle - slithering_serpents, Fri May 26 22:09:40 2006
• When this was written... - Rainshadow, Sat May 27 10:03:11 2006
• I have read the article numerous times.> - ChrisGilbert, Sat May 27 21:59:13 2006