Identical twins often share the same prenatal blood supply,and toxins in the mother's blood may contribute to schizophrenia.This suggests a role for _____ factors as a determinant of schizophrenia.
A)genetic
B)environmental
C)polygenic
D)pleiotropic

Question

Quizplus · Accepted Answer

The question is asking for the factor that contributes to the development of schizophrenia, specifically in relation to twins. Since identical twins share the same prenatal blood supply, it suggests that environmental factors (toxins in the mother's blood) play a role. Genetic factors (choice A) may also be involved, as there is a higher risk of developing schizophrenia if a family member has it, but the question is asking specifically about twins. Polygenic (choice C) and pleiotropic (choice D) factors refer to specific genetic mechanisms and do not directly relate to the question.

Identical Twins Often Share the Same Prenatal Blood Supply,and Toxins