PSYC 370 Lecture Notes - Lecture 31: Twin, Schizophrenia, Amniotic Sac
8 Jul 2019
School
Department
Course
Professor
Document Summary
If an individual has a spouse that is schizophrenic, their risk percentage of developing schizophrenia is 2%. This can be explained by the fact that stress is an environmental risk factor that can interact with a genetic vulnerability. The stress of taking care of a spouse with schizophrenia turns on the genetic vulnerability of the other individual. In different families, different mutations in different chromosomes may underlie schizophrenia! Epidemiological studies show that the father"s age is linked to the incidence of schizophrenia! 1/121 fathers in their late 20s = offspring w schizophrenia. This is due to the increased likelihood of sporadic mutations in the father"s genes across time! The prenatal environment (amniotic fluid, other components being transferred to infant like blood supply) are linked to rates of schizophrenia! Divisions when the blastocyst divide into two blastocysts - that gives rise to identical twins. Depending on when the division occurs, you can have monochorionic twins or dichorionic twins.
