Ok, but since albinism is recessive, wouldn't you need both chromosome to be T- ?
The 15 from the ball, and the other 15 from the burm ? or the 7 from the ball and the 7 from the burm ? otherwise it would be het albino on loci 15 and on loci 7.
Or you think that an animal with one T- on the 15 and one T- on the 7 wouldn't present melamine ?