Now, in this particular case, so we see that if we have either a homozygous dominant or a heterozygous for the Z gene, we're always going to produce a dark coat color, either black or chocolate. And these depends on the second type of gene. But if we have a homozygous recessive for the D gene so if both of these alleles on this homologous chromosome pair are lowercase DS, if they're recessive, then it doesn't matter what the second type of gene phenotype is, we're always going to produce a light coat color. We're going to produce the yellow coat color. So if both of these D genes are recessive, if they're lowercase DS, no matter what we're going to have in this case, we're going to inhibit the production of this. And so we're going to get a light yellow coat color.