risky to one’s survival. They would explain that people are willing to sacrifice their own well-beings due to expected reciprocation or kinship ties. Since the benefits outweigh the risks, the trait of altruism is passed on to future generations. • Behavioral-Genetic Behavioral-Genetic psychology is the study of genetic and environmental influences on human behavior (Cherry, n.d.). Behavioral-Genetic psychologists often play around with the “nature versus nurture” debate, trying to understand to