Seth and Zack are twin brothers; Seth is tall with blue eyes and brown hair and Zack is short with brown eyes and red hair. How were they most likely conceived?
a. One sperm fertilized one egg, which then split into two, early on in development.
b. Two sperm fertilized one egg, which split into two, early on in development.
c. One sperm fertilized two separate eggs.
d. Two sperm fertilized two separate eggs.
ANS: D
You might also like to view...
Although it is important for parents to listen to what their children have to say about the topic of sex, parents should consistently voice judgments about what their children say to make the discussion most effective
Indicate whether the statement is true or false.
In terms of sexual values of Islam, Prophet Muhammad's view was that
A. sexual tendencies originate out of the "forces of evil." B. intercourse in marriage is the highest good of human life. C. individuals may engage in sexual acts for pleasure outside marriage even without the consent of any one partner. D. sex for pleasure is a grievous sin not tolerated by the scripture.
The act of secretly watching someone undress or engage in some kind of intimate or sexual behavior is called ________.
Fill in the blank(s) with the appropriate word(s).
Why do primates that have been raised in isolation show mating problems?
A. They are more likely to engage in same-sex relations. B. They did not get the opportunity for sexual play. C. They engaged in sexual play with other primates. D. They faced abuse during their years in captivity. E. They all have a decreased drive for sex.