Quote:
Originally Posted by bliss
I was under the impression that with genetics, it was:
Normal x Dominant ... All offspring will physically show that dominant trait
Normal x Co-dominant... half and half. (example: non leather x Ita. leather = half leathers, half normal scale).
Normal x Recessive ... All normals, but all of them are carriers for that recessive trait.
Am I just misunderstanding something, or.. what?
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Yeah, you're right. My previous wasn't a complete answer.
Dominant
Dd X dd (Single Copy Dominant X Normal) = 50% Dominant trait, 50% Normal
DD X dd (Double Copy Dominant X Normal) = 100% Dominant trait
Codominant
"The genetic gist to codominance is pretty much the same as incomplete dominance. A hybrid organism shows a third phenotype --- not the usual "dominant" one & not the "recessive" one ... but a third, different phenotype. With incomplete dominance we get a blending of the dominant & recessive traits so that the third phenotype is something in the middle (red x white = pink)."
CC (Double Copy Codominant gene) example- silkie
Cc (Single Copy Codominant gene) example- italian leather back
cc (Normal) example- normal scale
CC x cc = 100% Cc. So, a silkie by a normal produces 100% italian leatherback
Cc x Cc = 25% silkie, 50% Italian Leather, 25% normal
This is what I meant when I said "If the trait is codominant then 100% of the hatchlings will be carriers, but will be visually something else that indicates that they carry the gene." A het for silkie dragon is visually an italian leatherback.
If blue eyes is codominant then there is another morphological trait being overlooked or that hasn't been discovered. For all we know, the CC for blue eyes is purple toenails. Or, if blue eyes is the CC then the het form might be green eyes, etc.
I can't make it any clearer than that, but I had to give it another shot.