Now, a colored shape basically describes an individual that has the phenotype for that particular disease and expresses that disease, while the uncooled individual, the uncolored shape, describes individual that does not show that particular phenotype for that particular disease, so they are not affected by that disease. Now, all these individuals, all these shapes found along the same road describe all the individuals that belong to the same exact generation. So, for example, individual one, two, three and four belong to, let's say the P generation. Individuals 56789 belong to the F one generation and individuals ten, 1112 and 13 belong to the F two generation. Now, said another way, if we belong to this generation here, then these are our parents. These are the siblings of our parents and these are our grandparents.