Question 1

What is the probability for the possible phenotypes that result from the cross of two heterozygous parents (Aa and Aa) ? (The A allele is for normal pigmentation, and the a allele is for albinism.)

Accepted Answer

A)   25% normal pigmentation; 75% albino
B)   50% normal pigmentation; 50% albino
C)   75% normal pigmentation; 25% albino
D)   100% normal pigmentationE) A) and B)
F) A) and C)

Question 2

During the early stages of pregnancy, the hormone __________ maintains the corpus luteum until the placenta is established.

Accepted Answer

A)   human chorionic gonadotropin
B)   testosterone
C)   estrogen
D)   progesteroneE) A) and B)
F) A) and C)

Question 3

From what vessels do the umbilical arteries arise?

Accepted Answer

A)   Internal iliac arteries
B)   Inferior and superior vena cavae
C)   Femoral arteries
D)   Superior and inferior mesenteric arteriesE) B) and C)
F) A) and D)

Question 4

Individuals with the homozygous recessive genotype (ss)  for sickle-cell anemia will have the disease. Those with the heterzygous genotype (Ss)  will have the sickle-cell trait, a mild form of the disease. Those with the homozygous dominant genotype (SS)  will not have any symptoms. What is the name of this kind of inheritance pattern?

Accepted Answer

A)   Incomplete dominance
B)   Polygenic inheritance
C)   Codominance
D)   Sex-linked inheritanceE) B) and D)
F) B) and C)

Question 5

What is a symptom of fetal alcohol spectrum disorder (FAS) ?

Accepted Answer

A)   Reduced head size
B)   Type 1 diabetes mellitus
C)   Stunted limb growth
D)   Heart defectsE) B) and C)
F) None of the above

Question 6

Hemophilia A is an X-linked recessive trait. Which would be true about the parents of a hemophiliac son?

Accepted Answer

A)   The mother must have the recessive allele. The father's genotype doesn't have any effect on the son.
B)   The father must have the recessive allele. The mother's genotype doesn't have any effect on the son.C) A) and B)
D) undefined

Question 7

Within a blastocyst, what group of cells give rise to the body of the developing offspring?

Accepted Answer

A)   Blastomere
B)   Inner cell mass
C)   Trophoblast
D)   Corona radiataE) B) and C)
F) A) and B)

Question 8

Sperm movement is aided by the presence of compounds called __________ in semen.

Accepted Answer

A)   estrogen
B)   proteins
C)   prostaglandins
D)   epinephrineE) B) and C)
F) None of the above

Question 9

What event triggers meiosis II in a secondary oocyte?

Accepted Answer

A)   Entry of sperm nucleus into oocyte cytoplasm
B)   Sperm cells breaking through the corona radiata
C)   Ovulation of the oocyte
D)   Implantation into uterine liningE) B) and C)
F) B) and D)

Question 10

Surfactant is necessary to increase surface tension in the lungs of a newborn.

Accepted Answer

A) True 
 B)False

Question 11

What enzyme, located on the sperm cell membrane, is needed to help the sperm penetrate an egg cell?

Accepted Answer

A)   Hyaluronidase
B)   Collagenase
C)   Peptidase
D)   AcetylcholinesteraseE) All of the above
F) A) and B)

Question 12

By what route do drugs ingested by a pregnant woman most likely reach her fetus?

Accepted Answer

A)   Through the allantois
B)   Through the amniotic membrane
C)   Through the placental membrane
D)   Through the yolk sacE) B) and C)
F) None of the above

Question 13

Each gene can have variations within its DNA sequence. These variants are called __________.

Accepted Answer

A)   alleles
B)   factorials
C)   traits
D)   autosomesE) B) and C)
F) A) and D)

Question 14

What term describes a person with two identical variants (alleles)  for a gene?

Accepted Answer

A)   Heterozygous
B)   Homozygous
C)   Autosomal
D)   PhenotypicalE) A) and B)
F) C) and D)

Question 15

What is contained within the amniotic cavity?

Accepted Answer

A)   Embryo
B)   Yolk sac
C)   Chorionic villi
D)   AllantoisE) A) and B)
F) A) and C)

Question 16

Which of the following indicates the correct order of phases of development?

Accepted Answer

A)   Zygote → morula → blastocyst → embryo → fetus → newborn
B)   Blastocyst → embryo → morula → zygote → fetus → newborn
C)   Zygote → blastocyst → morula → embryo→ fetus → newborn
D)   Morula → blastocyst → zygote → fetus → embryo → newbornE) B) and C)
F) A) and C)

Question 17

What blood vessel carries blood from the placenta to the fetus?

Accepted Answer

A)   Umbilical artery
B)   Umbilical vein
C)   Ductus venosus
D)   Ductus arteriosusE) B) and D)
F) A) and C)

Question 18

The ductus arteriosus carries blood from the __________ to the __________.

Accepted Answer

A)   right atrium; left atrium
B)   aorta; pulmonary trunk
C)   pulmonary trunk; aorta
D)   umbilical vein; inferior vena cavaE) B) and C)
F) A) and C)

Question 19

During the second and third trimesters, the uterine lining is maintained by the secretion of what hormone(s) ?

Accepted Answer

A)   Placental estrogen and placental progesterone
B)   Relaxin
C)   Human chorionic gonadotropin
D)   Follicle-stimulating hormone and luteinizing hormoneE) None of the above
F) C) and D)

Question 20

Cystic fibrosis is due to a recessive gene that affects the functioning of chloride channels. What is the genotype of an individual with this disease?

Accepted Answer

A)   Homozygous recessive
B)   Heterozygous
C)   Homozygous dominantD) All of the above
E) A) and B)

Exam 20: Pregnancy, Growth, Development, and Genetics

Correct Answer
verified

Sperm movement is aided by the presence of compounds called __________ in semen.

Correct Answer
verified

Cystic fibrosis is due to a recessive gene that affects the functioning of chloride channels. What is the genotype of an individual with this disease?

Correct Answer
verified

From what vessels do the umbilical arteries arise?

Correct Answer
verified

What term describes a person with two identical variants (alleles) for a gene?

Correct Answer
verified

Each gene can have variations within its DNA sequence. These variants are called __________.

Correct Answer
verified

Which of the following indicates the correct order of phases of development?

Correct Answer
verified

Surfactant is necessary to increase surface tension in the lungs of a newborn.

Correct Answer
verified

During the early stages of pregnancy, the hormone __________ maintains the corpus luteum until the placenta is established.

Correct Answer
verified

During the second and third trimesters, the uterine lining is maintained by the secretion of what hormone(s) ?

Correct Answer
verified

Within a blastocyst, what group of cells give rise to the body of the developing offspring?

Correct Answer
verified

What is the probability for the possible phenotypes that result from the cross of two heterozygous parents (Aa and Aa) ? (The A allele is for normal pigmentation, and the a allele is for albinism.)

Correct Answer
verified

By what route do drugs ingested by a pregnant woman most likely reach her fetus?

Correct Answer
verified

What event triggers meiosis II in a secondary oocyte?

Correct Answer
verified

The ductus arteriosus carries blood from the to the .

Correct Answer
verified

Hemophilia A is an X-linked recessive trait. Which would be true about the parents of a hemophiliac son?

Correct Answer
verified

What is contained within the amniotic cavity?

Correct Answer
verified

What enzyme, located on the sperm cell membrane, is needed to help the sperm penetrate an egg cell?

Correct Answer
verified

What blood vessel carries blood from the placenta to the fetus?

Correct Answer
verified

What is a symptom of fetal alcohol spectrum disorder (FAS) ?

Correct Answer
verified

Exam 20: Pregnancy, Growth, Development, and Genetics

Correct AnswerverifiedShow Answer

Sperm movement is aided by the presence of compounds called __________ in semen.

Correct AnswerverifiedShow Answer

Cystic fibrosis is due to a recessive gene that affects the functioning of chloride channels. What is the genotype of an individual with this disease?

Correct AnswerverifiedShow Answer

From what vessels do the umbilical arteries arise?

Correct AnswerverifiedShow Answer

What term describes a person with two identical variants (alleles) for a gene?

Correct AnswerverifiedShow Answer

Each gene can have variations within its DNA sequence. These variants are called __________.

Correct AnswerverifiedShow Answer

Which of the following indicates the correct order of phases of development?

Correct AnswerverifiedShow Answer

Surfactant is necessary to increase surface tension in the lungs of a newborn.

Correct AnswerverifiedShow Answer

During the early stages of pregnancy, the hormone __________ maintains the corpus luteum until the placenta is established.

Correct AnswerverifiedShow Answer

During the second and third trimesters, the uterine lining is maintained by the secretion of what hormone(s) ?

Correct AnswerverifiedShow Answer

Within a blastocyst, what group of cells give rise to the body of the developing offspring?

Correct AnswerverifiedShow Answer

What is the probability for the possible phenotypes that result from the cross of two heterozygous parents (Aa and Aa) ? (The A allele is for normal pigmentation, and the a allele is for albinism.)

Correct AnswerverifiedShow Answer

By what route do drugs ingested by a pregnant woman most likely reach her fetus?

Correct AnswerverifiedShow Answer

What event triggers meiosis II in a secondary oocyte?

Correct AnswerverifiedShow Answer

The ductus arteriosus carries blood from the __________ to the __________.

Correct AnswerverifiedShow Answer

Hemophilia A is an X-linked recessive trait. Which would be true about the parents of a hemophiliac son?

Correct AnswerverifiedShow Answer

What is contained within the amniotic cavity?

Correct AnswerverifiedShow Answer

What enzyme, located on the sperm cell membrane, is needed to help the sperm penetrate an egg cell?

Correct AnswerverifiedShow Answer

What blood vessel carries blood from the placenta to the fetus?

Correct AnswerverifiedShow Answer

What is a symptom of fetal alcohol spectrum disorder (FAS) ?

Correct AnswerverifiedShow Answer

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

The ductus arteriosus carries blood from the to the .

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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