No, not really. It just means that they discovered what I already knew based on many decades of genetics in other species.
Think of a gene as a set of IKEA instructions. You open the box, dump everything out, find the instructions, read them start to finish, follow them step-by-step, and end up with a piece of furniture.
But let us make this more like a real genetics situation. You pick up two of these pieces of furniture from IKEA.
First scenario:
You open the first box. you dump everything out, there are no instructions!!!
No problem, you open the second box, dump everything out, find the instructions, read them start to finish, follow them step-by-step, and end up with two complete pieces of furniture.
Second scenario:
You open the first box. you dump everything out, find the instructions, but the instructions are missing the last three pages…
No problem, you open the second box, dump everything out, find the instructions, read them start to finish, follow them step-by-step, and end up with two complete pieces of furniture.
Third scenario, part A:
You open the first box. you dump everything out, find the instructions, but the instructions are missing the last three pages…
No problem, you open the second box, dump everything out, find the instructions, but the instructions are missing the last three pages…
Third scenario, part B:
You open the first box. you dump everything out, there are no instructions!!!
No problem, you open the second box, dump everything out, there are no instructions!!!
Third scenario, part C:
You open the first box. you dump everything out, there are no instructions!!!
No problem, you open the second box, dump everything out, find the instructions, but the instructions are missing the last three pages…
UH-OH! Regardless of which combination you end up with, it looks like you are not going to be able to build the furniture
This is what is happening with the Albino alleles that Hannah has found. And, as I noted above, it is a well known phenomenon. In the common lab mouse they have found something like 12 different alleles that all make the classic “red-eyed/white” Albino phenotype. In Danios there are, I think, 9 different alleles.
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There are only a finite number of ways you can “break” the tyr so it is hyperbole to say the possibilities are “infinite”. And as far as getting double recessives out of them, that is just the pure and simple nonsense of someone that does not understand genetics half as well as they pretend to. If you go back to my examples above, there is no way you can end up with four sets of incomplete instructions from two boxes.
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^^^
THIS
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Nah, high and low contrast are all secondary phenotypes
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Well it depends on the combination. Anything paired with Albino will look like an Albino but if you made a Candy Ultramel it would most probably look like a really really washed out Lav