CAS PS 241 Lecture Notes - Lecture 6: Heritability
25 Sep 2016
School
Department
Course
Professor
Document Summary
Combination studies also exist, most common is adopted twins. These studies do not tell us what specific gene or environment caused the difference, but it shows us what role each played. The more closely related people are, the closer their behaviors should be. Segregating genes: genes that differ in the population (all humans share 99. 9%, these are the other few that make us unique) The issue with family studies is that it can only tell you about familial similarities; genetic and environmental influence can"t be separated. Identical twins (monozygotic, mz) have 100% same dna, fraternal (dizygotic, dz) share. Different classes, peer groups, one has illness other doesn"t, accident, different sports teams, etc. There will always be some form of non-shared, even if just due to measurement error. Parent interactions are often non-shared because parents deal with each individual child a bit differently. For identical twins, all differences between them are a result of non-shared environments because their genes are identical.
