Now, we also have these lines. What exactly the lines actually describe? Well, the lines describe the relationship between the different individuals of our family. Remember, the pedigree describes the ancestry of our family. So basically, if we look at individual one and individual two, what this line describes is the fact that this is a married couple and they have three children, five, six and seven, which are all normal with respect to the phenotype. Now, this is couple number two.