Are you intending to breed these rats? If you don't know the genetics involved and can't trace their lines, I wouldn't recommend it. However I believe Rex is a dominant trait, and if so the babies would be a mix of Rex and regular furred.
probably all single rex, as one copy of the rex gene will give rex babies. Coloration will depend on the coloration of the mother (markings / coat color).
rex and hooded apply to two different features!
Rex applies to fur. Rex = curly fur, double-rex = patchy fur. Either of these with a standard baby is likely to produce rex babies.
Hooded is a marking! The markings that result will depend on what the mother's markings are as well.
A forum community dedicated to Rat owners and enthusiasts. Come join the discussion about breeds, health, behavior, housing, adopting, care, classifieds, and more!