Studies of Identical and Fraternal Twins Indicate That About ________

question 561

Multiple Choice

Studies of identical and fraternal twins indicate that about ________ percent of the difference among people's happiness ratings is heritable.

• A) 10
• B) 30
• C) 50
• D) 70

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Definitions:

Amniotic Sac

The sac containing the fetus.

Androgens

A group of hormones that play a role in male traits and reproductive activity; present in both males and females, they are typically higher in males.

Oxytocin

A hormone that acts as a neurotransmitter in the brain, playing roles in social bonding, reproduction, childbirth, and the period after childbirth.

Progesterone

A steroid hormone released by the corpus luteum that regulates the condition of the inner lining (endometrium) of the uterus, preparing it for pregnancy.