Question 1

Which of the following best describes the numbers of blood vessels usually found in the umbilical cord?

Accepted Answer

A)   one artery and one vein
B)   two arteries and one vein
C)   one artery and two veins
D)   two arteries and two veins
E)   two arteries and no veinsF) B) and D)
G) B) and E)

Question 2

The hormone oxytocin aids the birth process by stimulating

Accepted Answer

A)   fetal muscular movements.
B)   uterine wall contractions.
C)   an increase in progesterone secretion.
D)   an increase in estrogen secretion.
E)   rapid movement of fetal feet.F) C) and E)
G) B) and E)

Question 3

Muscle contractions of the uterine wall and ________ in the semen aid sperm cell movement through the uterus and uterine tubes.

Accepted Answer

A)   estrogen
B)   progestins
C)   prostaglandins
D)   epinephrine
E)   norepinephrineF) B) and C)
G) D) and E)

Question 4

The symptoms of fetal alcohol syndrome include

Accepted Answer

A)   reduced head size.
B)   mental retardation.
C)   abnormal facial features.
D)   misshapen eyes.
E)   all of the above.F) A) and B)
G) A) and E)

Question 5

Dizygotic twins result from the combination of

Accepted Answer

A)   one egg cell and one sperm cell.
B)   one egg cell and two sperm cells.
C)   two egg cells and one sperm cell.
D)   two egg cells and two sperm cells.
E)   one trophoblast and two blastocysts.F) B) and D)
G) All of the above

Question 6

Which of the following nutrients provides the most energy to the newborn baby during its first few days?

Accepted Answer

A)   glucose
B)   glycogen
C)   stored fat
D)   protein
E)   fat in the colostrumF) C) and E)
G) A) and D)

Question 7

The ductus arteriosus allows fetal blood to bypass the liver.

Accepted Answer

A) True 
 B)False

Question 8

The condition characterized by the presence of a developing embryo within the uterus is called ________.

Accepted Answer

The answer of The condition characterized by the presence of...

Question 9

Drugs ingested by a pregnant woman most likely reach her fetus by passing through the

Accepted Answer

A)   allantois.
B)   amniotic membrane.
C)   placental membrane.
D)   body stalk.
E)   yolk sac.F) B) and D)
G) A) and E)

Question 10

Blood rich in oxygen and nutrients is transported from the placenta to the fetus by the

Accepted Answer

A)   umbilical artery.
B)   umbilical vein.
C)   ductus venosus.
D)   ductus arteriosus.
E)   foramen ovale.F) B) and D)
G) A) and B)

Question 11

An enzyme that sperm secrete that is important for penetration of the egg is

Accepted Answer

A)   hyaluronidase.
B)   collagenase.
C)   peptidase.
D)   acetylcholinesterase.
E)   copulase.F) D) and E)
G) C) and E)

Question 12

A multifactorial trait is

Accepted Answer

A)   determined solely by environmental factors.
B)   determined solely by genetic factors.
C)   determined by neither genetic nor environmental factors.
D)   determined by one or more genes and environmental factors.
E)   determined by proteins.F) A) and B)
G) A) and E) D

Question 13

The extraembryonic membrane that forms blood cells and gives rise to cells destined to become sex cells is the ________.

Accepted Answer

yolk sac

Question 14

Teratogens are substances that

Accepted Answer

A)   stimulate embryonic growth.
B)   cause congenital malformations.
C)   protect against infections.
D)   prevent accumulation of cholesterol.
E)   stimulate fetal growth.F) D) and E)
G) B) and E) B

Question 15

The period of development in which the cells of a zygote become progressively smaller as cell division occurs is called ________.

Accepted Answer

The answer of The period of development in which the...

Question 16

A person with two identical variants (alleles) for a gene is

Accepted Answer

A)   heterozygous.
B)   homozygous.
C)   autosomal.
D)   a carrier.
E)   dominant.F) B) and D)
G) A) and E)

Question 17

The genotypes and phenotypes that result from the cross of Aa and Aa (A=normal pigmentation and a=albinism) are

Accepted Answer

A)   genotypes-25% AA,50% Aa,25% aa;phenotypes-75% normal,25% albino.
B)   genotypes-100% aa;phenotypes-50% normal,50% albino.
C)   genotypes-50% AA,50% aa;phenotypes-50% normal,50% albino.
D)   genotypes-25% AA,50% Aa,25% aa;phenotypes-25% normal,75% albino.
E)   genotypes-75% AA,25% aa;phenotypes-75% normal,25% albino.F) B) and E)
G) B) and D)

Question 18

The combining of a secondary oocyte and a sperm cell is called

Accepted Answer

A)   fertilization.
B)   implantation.
C)   cleavage.
D)   labor.
E)   development.F) B) and D)
G) A) and B)

Question 19

A newborn's first breath must be particularly forceful since the moist membranes of the lungs are held together by ________.

Accepted Answer

The answer of A newborn's first breath must be particularly...

Question 20

The external reproductive organs can be distinguished by the ________ week of development

Accepted Answer

A)   first
B)   fifth
C)   eighth
D)   twelfth
E)   fifteenthF) A) and B)
G) A) and C)

Exam 20: Pregnancy, growth, development, and Genetics

Which of the following best describes the numbers of blood vessels usually found in the umbilical cord?

Correct AnswerverifiedShow Answer

The hormone oxytocin aids the birth process by stimulating

Correct AnswerverifiedShow Answer

Muscle contractions of the uterine wall and ________ in the semen aid sperm cell movement through the uterus and uterine tubes.

Correct AnswerverifiedShow Answer

The symptoms of fetal alcohol syndrome include

Correct AnswerverifiedShow Answer

Dizygotic twins result from the combination of

Correct AnswerverifiedShow Answer

Which of the following nutrients provides the most energy to the newborn baby during its first few days?

Correct AnswerverifiedShow Answer

The ductus arteriosus allows fetal blood to bypass the liver.

Correct AnswerverifiedShow Answer

The condition characterized by the presence of a developing embryo within the uterus is called ________.

Correct AnswerverifiedShow Answer

Drugs ingested by a pregnant woman most likely reach her fetus by passing through the

Correct AnswerverifiedShow Answer

Blood rich in oxygen and nutrients is transported from the placenta to the fetus by the

Correct AnswerverifiedShow Answer

An enzyme that sperm secrete that is important for penetration of the egg is

Correct AnswerverifiedShow Answer

A multifactorial trait is

Correct AnswerverifiedD

The extraembryonic membrane that forms blood cells and gives rise to cells destined to become sex cells is the ________.

Correct Answerverifiedyolk sac

Teratogens are substances that

Correct AnswerverifiedB

The period of development in which the cells of a zygote become progressively smaller as cell division occurs is called ________.

Correct AnswerverifiedShow Answer

A person with two identical variants (alleles) for a gene is

Correct AnswerverifiedShow Answer

The genotypes and phenotypes that result from the cross of Aa and Aa (A=normal pigmentation and a=albinism) are

Correct AnswerverifiedShow Answer

The combining of a secondary oocyte and a sperm cell is called

Correct AnswerverifiedShow Answer

A newborn's first breath must be particularly forceful since the moist membranes of the lungs are held together by ________.

Correct AnswerverifiedShow Answer

The external reproductive organs can be distinguished by the ________ week of development

Correct AnswerverifiedShow Answer

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D

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yolk sac

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B

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