By 11th grade, ____ of adolescents have experienced a romantic relationship

At low to moderate doses, what is the usual effect of alcohol?

a. Aggressive behavior b. Improved memory c. Relaxation d. Increased inhibitions

As it suddenly appeared in the bloodline of the royal family of Europe, hemophilia is best explained in terms of

a. polygenic inheritance. b. chromosomal abnormalities. c. sex-linked inheritance. d. a genetic mutation.