The second quartile is the

The extra 21st chromosome that is found with Down syndrome usually comes from the father's sperm

Indicate whether the statement is true or false

Regarding the double standard, which of the following statements is/are TRUE?

a. The double standard refers to using different rules when it comes to judging the appropriateness of male and female sexual behavior. b. In the past, the double standard allowed males, but not females, to have premarital sex. c. The double standard resulted in a separate, but not equal, view of sexual behavior by men and women. d. All of these statements are true.