H square

H-square or h2 is a number which measures how much a person's genetic make-up contributes to the variation in certain traits. In other words, it is a way of measuring how much your genes determine the traits that you have like your eye color, height, skin color, etc. H2 is an important number because it helps scientists understand the role of genes in different diseases and conditions. For example, if a person has a higher h2 number for a certain disease, it means that their genes may be more likely to play a role in the development of the disease.