Is graypearl the same as lavender? I remember that you used to raise paints but gave them up. Is that be cause they don't breed true or do they breed true in EU?
I try to make a simple resumé to avoid further confusions. We must make a distinction between the name of a "gene" (= genetic-term) and the name of a "coloration" (= hobby-name).
Lavender is the name of the color-gene
lav/lav
lav/lav is a recessive gene. A recessive gene need
both alleles in the mutated form to can express.
So
Lav+/lav is only 1 allel (or single doses) so this will
not express but the bird is split (carrier) of 1 doses lavender.
Graypearl is the name for what we can see with the eye of the expression of the black-pigment diluted by the gene lavender (= a coloration).
Cream is the name for what we can see with the eye of the color-expression of red-pigment diluted by the gene lavender (= a coloration).
When we can see graypearl and cream at the same time this is called
Isabel (= a coloration). (this bird have a double doses of lav/lav and will breed 100% true when bred to a similar bird with double doses of lav/lav)
When we can see graypearl and cream and white at the same time this is (wrongly but common) called
Porcelain (= a coloration). (this bird have a double doses of lav/lav and will breed 100 % true when bred to a similar bird with double doses of lav/lav)
When you breed a Isabel or a Porcelain or a graypearl (all have a double doses of lav/lav) to a bird with NO doses of Lav+/Lav+ you will become 0% true breedings but all becomed chicks will be "split" Lav+/lav = carrier of 1 doses of the gene lavender. All these chicks will show their original coloration, which can be Partridge, Buff, Splash or Black, Blue, ....
Paints (= a coloration) is the name given to the phenomenon of a white with black spots (looks a little similar as a solid black with 2 doses dilution of Bl/Bl what is called Splash but is genetically totaly different).
As far as is known a Paint X Paint produces 25% Black / 50% Paints / 25% White (this is for the EU Paints), so EU Paints breed for 50% true.