Which statement best summarizes research on genetic factors in relationship preferences?

Which statement best summarizes research on genetic factors in relationship preferences?

• A. There are no genetic factors.
• B. There may be genetic or biological factors influencing monogamous or non-monogamous preferences.
• C. Genetics determine monogamy with complete certainty.
• D. Genetic factors only affect sexual orientation, not relationship style.

Answer: (B)

Genetic and biological influences can shape how people approach relationships, but they don’t lock in a single path. Research suggests there is some heritable component to relationship preferences, meaning genetics may play a role in whether someone leans toward monogamy or non-monogamy. However, these effects are modest and not deterministic—environment, upbringing, culture, values, and life experiences all interact with biology. This is why the best summary is that there may be genetic or biological factors influencing these preferences, rather than stating there are no factors, that genetics determine monogamy with certainty, or that genetics only affect sexual orientation.

Genetic and biological influences can shape how people approach relationships, but they don’t lock in a single path. Research suggests there is some heritable component to relationship preferences, meaning genetics may play a role in whether someone leans toward monogamy or non-monogamy. However, these effects are modest and not deterministic—environment, upbringing, culture, values, and life experiences all interact with biology. This is why the best summary is that there may be genetic or biological factors influencing these preferences, rather than stating there are no factors, that genetics determine monogamy with certainty, or that genetics only affect sexual orientation.