A Breeder jumped down my throat at Tinley...

[paulh]

I've been on both sides of genetics lectures, so I sympathize with both sides. Nevertheless, there is a time and place for them, and a reptile sale probably isn't either.

To answer the codominant question, here is a quote:
"In his law of dominance, Mendel did not accommodate different degrees of dominance. As such examples were discovered (Bateson 1913), various new terms were introduced. Within and between textbooks of genetics definitions are inconsistent. Various names have been used: partial dominance, incomplete dominance, codominance, lack or absence of dominance, intermediate dominance, imperfect dominance, egalitarian dominance, and transdominance. The definitions vary from text to text and depend on interpretation of allelic function, although an allele’s function is seldom known and often must be assumed. In all these usages there is one consistent aspect; each genotype has a distinguishable phenotype, and the genotype may be inferred from the phenotype. Perhaps none of the terms that have been used are all-inclusive, but some such term is desirable for teaching purposes. We have chosen the term codominance as simplest, shortest, and adequately inclusive. One can still use specialized sub-definitions for well-analyzed cases. In our more that 20 years of teaching this method has worked well."

From Miller, W. J. and Hollander, W. F., 1995, Three neglected advances in classical genetics, BioScience 45: 98-104. Available on Miller's web site, www.ringneckdove.com.

Any breeder would probably find the whole paper worth reading.