Reference no: EM133535680

Question 1: What causes homosexuality? The facts so far seem to be these:

• Homosexuality does appear to run in families.
• Identical twins are more likely than fraternal twins to share a homosexual orientation.
• Men with a greater number of older brothers are more likely to be gay (about one-third more likely for each older brother). The same is not true for adopted brothers.

Which of these facts is evidence for a genetic component?

Question 2: Which of these facts is evidence for an environmental (prenatal) component?

Question 3: For which is it unclear (could be either or both)?

Question 4: Briefly explain your rationale for each of the above replies.