Horse Color Genetics: Terminology

If you have any questions, please refer back to this post here.
I'm doing this post because, after sharing some of these posts, some people got a little confused with my terminology. So, I will re-go over some of the stuff from the first post.

Allelle vs. Gene: It is the same thing. If I say allelle, I mean a gene. They are interchangeable. Every horse contains two of each different kind of allelle (i.e. two black genes, whether dominant or recessive).

Genome: The DNA code inside the horse. It is showed with a string of letters. Each letter is in pairs, and every letter is either uppercase or lowercase.

Dominant vs. Recessive: Dominant and recessive refers to whether your horse has the certain gene or not. If your horse has a dominant black gene, it has a black gene. If it has a recessive black gene, it does not. Capitol letters indicate dominancy, and lowercase indicate recessiveness.

Homozygous vs. Heterozygous: Homozygous (usually when I say homozygous I mean homozygous dominant, not homozygous recessive; I usually say ust recessive if the horse is homozygous recessive) means that the horse has two of the same kind of gene. For instance: two dominant black allelles would be homozygous dominant black. Does that make sense? Why homozygous or heterozygous is important when breeding horses and understanding genetics is that, because we know what both genes are if the horse is homozygous, you can better predict what color the offspring will be.
If the horse is heterozygous, you will not really be able to guess; it is a 50/50 chance it will get the dominant gene or the recessive gene.

Simple Dominant vs. Incomplete Dominant: Some colors, like the E, A, and T gene, will display the same whether it is homozygous or heterozygous. These are called simple dominant. Some colors, like Cr and LP, will look different if they are homozygous or heterozygous. Example: if a horse only has 1 dominant cream gene, it will be palomino. But if it has two, then it will be cremello. So the colors are completely different.

Zygosity: Zygosity refers to knowing if your horse is homozygous or heterozygous.