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Super Snow Eyes

I'd have to agree with Madde for the most part...Given the inheritence pattern the traits in question would be by definition in incomplete dominance. However, this is only the case if the genes are mendelian genes. What I mean by this is there could be many other variables involved, including the penetrance of the mutation (Chances of the genotype being expressed as a phenotype). There could also be multipe genes responsible for the phenotype that are close together on the chromosome, and be in linkage disequilibrium. All this means that genes that are close together, tend to stay together during crossing over in meiosis. So you could have multiple genes responsible for the phenotype, but the inheritance of the genes leads you to believe it's incompletely dominant.
Just to clarify an Incomplete dominant trait would be like feather color in chickens, you breed a homozygous black chicken to a homozygous white you get grey birds. THe black gene and the white gene are expressed simotaneously to give a grey phenotype. A codominant trait is similar and related to incomplete dominance. Instead of an intermediate phenotype (Grey birds) BOTH homozygotes are expressed . This is like blood type genes, if one of your parents has homozygous A type blood, and one has homozygous B type blood you will have AB type blood, because you are expressing both geneotypes.
Hope I didn't confuse you anymore, I'm not familiar with gecko genetics as I map genes in swine, but hopefully I helped
J. Dustin Loy
 
Good call John...only error I see with that is that once you get into incomplete or co-dominance you are already past Mendelian genetics...because all he came up with was simple dominance/recessiveness (at least I think that's right...).
 
well

i have always agreed these were incomplete dominance , only thought co-dom. was short for incomplete lol good to know there is a difference there ;)
 
Yes, right, i meant to say there not simple mendelian genes, more complex then just dominant/recessive
 
Thank's Stina. There is no personal vendetta, becouse I do not know who Chad is. I know no one in USA, I live in the opposite side of the earthglobe (Sweden) and have no contact with any in USA. But maybe my english is a bit hard to understand, I don't know if I using the wright words sometimes.

But I like genetics and leopardgeckos and with my basic knowlegde of rodent genetics it is a thrill to learn about a new kind of genetics, the reptile genetics, and I'm only trying to puzzle together the genetics in the leopardgecko. And there is a good help in using snake genetics, they are both reptiles and should function in the same way more or less. And to talk to you other guys that has worked with leopardgeckos and their genetics is a very good help too.
 
no vendetta. i wasnt jumping down anyones throat.

but before i go on id like to state that i now agree with both the girls on this one.

it occurred to me as i was staring at my kitten (keep in mind ive been pondering the difference between codom vs. imcomplete dom since Madde made her initial statement about it). when the kitten was first born it was gray. now it is solid black except for its belly mouth and feet. i thought to myself thats a great example of melanism but than i looked down and seen her paws and thought why doesnt the melanin take over that fur as well.

"AH HA!" i said. "thats it! CO- DOMINANCE!" like stinaUIUC was saying about cows or horses or whatever.

so now i see it like this:

say you have two tubes of paint that represent homozygous animals. one black, one white. if you squirt out some from each tube side by side that would be a heterozygous CODOMINANT offspring (if you will). if you mixed those two puddles of white and black youd get gray... thats incomplete dominance.

am i right?
 
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