So we have a total of eight genes, but we have a total of four alleles. This is one allele pair, a second allele pair. We have a third allele pair and a fourth allele pair. So let's say that this codes for some type of trait. Let's suppose it's the height, and this also must code for that same type of trait for the height. But that doesn't mean that these must code for the same exact type of protein.