The way I understand Pastels.....

The Pastel trait is Polygenic period. - This means that within any given animal you have what I call a string of genetic traits....along this string you can stock-pile certain specific traits...both good and bad....
When we come across a normal animal exhibiting a reduction in melanin....we breed that to another visible normal animal exhibiting similar reductions and the species genetic string is compounded or layered with genetic traits to intensify that particular look.

In basic terms...we take a light normal colombian and breed it to a light normal colombian....most think they look better...while some like the particularly darker variety...it all adds flavor!

Now just like you refined the animal you can UN-refine it as well...it all works in reverse....

Now I have seen ....Basically....white boas....pink boas...red boas...yellow boas...blue boas...all normals!!!!.....so as for color this may be passed on in a Co-dom form as it seems to show up in litters this way...but the pastel trait which is reduction of black melanin...is Polygenic....in my opinion.

As for The Hypo trait....

As was stated...it is a Co-dom trait with a Dominant super form. You can distinguish red phase animals from the normals clearly...and it does not matter what type of normal you breed they will produce Red hypo babies.


Hope this helps Andy
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