If genes are important, identical twins should be more similar because they have 100% of their genes in common. (Sigelman and Rider 2014) A scientist conducted a study on a group of identical twins. This study differed from other twin studies because it followed the separated couple from birth to adulthood. Scientists could compare their similarities as well as their differences. The argument was that twins raised in the same environment may be similar because of their identical genetics or identical environment. As twins are raised separately, the differences between them must be attributed to differences in their environment, while the similarities are primarily due to their sameness. heredity. (Gruber 1981) Paula Bernstein and Elyse Schein had participated in a secret research project in the 1960s and 1970s that separated identical twins as infants and followed their development in a first-of-its-kind experiment to assess the influence of nature on .nourishing the development of the child. (Richman 2007) The biological parents and children were unaware of the true subject of the study. The twins were separated at birth and not reunited until 35 years later. “Since I met Elyse, it’s undeniable that genetics plays a huge role, probably more than 50 percent,” Bernstein says. "It's not just about our taste in music or books; it goes beyond