1. Nancy is 15 years old and has just found out she is pregnant. Although the pregnancy is unintended, Nancy may take some comfort in knowing that unintended pregnancies comprise about what percent of all teen pregnancies in the United States today? a. two-thirds b. half c. one-third d. 10% 2. Lacy is 38 years old and has just found out she is pregnant. Although the pregnancy is unintended, Lacy may take some comfort in knowing that unintended pregnancies comprise about what percent of all pregnancies in the United States today? a. two-thirds b. half c. one-third d. 10%  Which type of genetic information is NOT included in a one-celled fertilized egg? a. genetic instructions for whether the sex of the child will be male or female b. genetic instructions for how tall the child will likely be at adulthood c. genetic instructions for eye color d. All genetic instructions are present from the point of fertilization on. 4. In a typical normal pregnancy, which of the following statements about the length of trimesters is correct? a. The first trimester is the longest. b. The second trimester is the longest. c. The third trimester is the longest. d. All trimesters are about the same length. 5. What is the correct developmental sequence of the periods of prenatal development? a. germinal, embryonic, fetal b. embryonic, fetal, germinal c. fetal, germinal, embryonic d. germinal, fetal, embryonic 6. The germinal period of prenatal development begins with conception and ends about ___ later. a. one trimester b. two weeks c. one month d. 12 weeks 7. What is the release of the ovum from the ovary called? a. ovulation b. fertilization c. implantation d. menstruation 8. When does ovulation typically occur? a. during menstruation b. the day before the onset of menstruation c. the 14th day after the onset of menstruation d. the day after menstruation has ceased 9. After studying human prenatal development, Rita should know that one (or more) of her ova will begin to undergo the final stage of meiosis at about what point in each of her menstrual cycles? a. on the first or second day of a regular menstrual period b. on about the 10th day after the start of a regular menstrual period c. about two weeks after the start of a regular menstrual period d. on about the 28th day after the start of a regular menstrual period 10. Suppose that Judy’s menstrual cycle begins on the first day of July. On which day should she expect that ovulation will occur? a. July 1 b. July 10 c. July 14 d. July 28