Question 1

A bulbourethral gland secretes

Accepted Answer

A)  sperm. 
B)  a mucus-like fluid. 
C)  blood. 
D)  saliva. 
E)  sweat. 
A)  sperm. 
B)  a mucus-like fluid. 
C)  blood. 
D)  saliva. 
E)  sweat. B

Question 2

Thalidomide is

Accepted Answer

A)  a drug that causes fetal alcohol syndrome. 
B)  a drug that causes fetal limb defects, but is used to treat leprosy. 
C)  a drug that causes mental retardation in fetuses, but is used to treat acne. 
D)  a type of bacterial infection. 
E)  a vitamin that harms fetuses in megadoses. 
A)  a drug that causes fetal alcohol syndrome. 
B)  a drug that causes fetal limb defects, but is used to treat leprosy. 
C)  a drug that causes mental retardation in fetuses, but is used to treat acne. 
D)  a type of bacterial infection. 
E)  a vitamin that harms fetuses in megadoses. B

Question 3

During the embryonic stage,the primary germ layers develop from the

Accepted Answer

A)  placenta. 
B)  blastocyst. 
C)  embryonic disk. 
D)  uterus. 
E)  morula. 
A)  placenta. 
B)  blastocyst. 
C)  embryonic disk. 
D)  uterus. 
E)  morula. C

Question 4

Crossing over occurs during

Accepted Answer

A)  prophase I. 
B)  metaphase I. 
C)  prophase II. 
D)  metaphase II. 
E)  independent assortment. 
A)  prophase I. 
B)  metaphase I. 
C)  prophase II. 
D)  metaphase II. 
E)  independent assortment.

Question 5

Connective tissues are part of the primordial embryo's

Accepted Answer

A)  mesoderm. 
B)  endoderm. 
C)  ectoderm. 
D)  epidermis. 
E)  spermoderm. 
A)  mesoderm. 
B)  endoderm. 
C)  ectoderm. 
D)  epidermis. 
E)  spermoderm.

Question 6

The symptoms of fetal alcohol syndrome include

Accepted Answer

A)  an enlarged head. 
B)  impaired intellect. 
C)  an extra nipple. 
D)  accelerated growth. 
E)  webbing between the toes. 
A)  an enlarged head. 
B)  impaired intellect. 
C)  an extra nipple. 
D)  accelerated growth. 
E)  webbing between the toes.

Question 7

Meiosis in females

Accepted Answer

A)  occurs and completes continually, producing millions of ova. 
B)  only completes if an oocyte is fertilized. 
C)  results in large, mature polar bodies. 
D)  completes in one or two oocytes every month before ovulation. 
E)  is completed before birth. 
A)  occurs and completes continually, producing millions of ova. 
B)  only completes if an oocyte is fertilized. 
C)  results in large, mature polar bodies. 
D)  completes in one or two oocytes every month before ovulation. 
E)  is completed before birth.

Question 8

The ovary of a newborn girl houses about ___ primary oocytes.

Accepted Answer

A)  100 
B)  1,000 
C)  10,000 
D)  100,000 
E)  1,000,000 
A)  100 
B)  1,000 
C)  10,000 
D)  100,000 
E)  1,000,000

Question 9

Sperm undergo capacitation

Accepted Answer

A)  in the testicles as sperm develop. 
B)  in the woman's body. 
C)  just after the second polar body is ejected. 
D)  immediately following a sperm's penetration of an oocyte. 
E)  during sexual intercourse. 
A)  in the testicles as sperm develop. 
B)  in the woman's body. 
C)  just after the second polar body is ejected. 
D)  immediately following a sperm's penetration of an oocyte. 
E)  during sexual intercourse.

Question 10

The placenta

Accepted Answer

A)  transforms the breasts from fatty sacs to glands that secrete milk. 
B)  is where blood cells form before the fetus has bone marrow. 
C)  nourishes the fetus and secretes hormones that maintain the pregnancy. 
D)  is a membrane surrounding the embryo that gives rise to the blood vessels in the umbilical cord. 
E)  is the membrane that contains the fetus. 
A)  transforms the breasts from fatty sacs to glands that secrete milk. 
B)  is where blood cells form before the fetus has bone marrow. 
C)  nourishes the fetus and secretes hormones that maintain the pregnancy. 
D)  is a membrane surrounding the embryo that gives rise to the blood vessels in the umbilical cord. 
E)  is the membrane that contains the fetus.

Question 11

Monica takes the drug Accutane throughout her pregnancy,and her child has mental retardation and heart problems,due to the exposure.Accutane is a(n)

Accepted Answer

A)  estrogen. 
B)  mutagen. 
C)  teratogen. 
D)  pregnancy modifier. 
E)  carcinogen. 
A)  estrogen. 
B)  mutagen. 
C)  teratogen. 
D)  pregnancy modifier. 
E)  carcinogen.

Question 12

Rachel is excited when her pregnancy test is positive,but an ultrasound scan at 6 weeks shows no heartbeat.What might have happened is

Accepted Answer

A)  two sperm fertilized each other. 
B)  an embryo developed from a haploid oocyte alone. 
C)  two polar bodies combined. 
D)  a polar body fertilized an oocyte. 
E)  Rachel did the pregnancy test wrong. 
A)  two sperm fertilized each other. 
B)  an embryo developed from a haploid oocyte alone. 
C)  two polar bodies combined. 
D)  a polar body fertilized an oocyte. 
E)  Rachel did the pregnancy test wrong.

Question 13

Blastocyst cells that give rise to the embryo's body constitute the

Accepted Answer

A)  blastomere. 
B)  inner cell mass. 
C)  outer cell mass. 
D)  mesoderm. 
E)  extraembryonic membrane. 
A)  blastomere. 
B)  inner cell mass. 
C)  outer cell mass. 
D)  mesoderm. 
E)  extraembryonic membrane.

Question 14

The major body part(s)derived from ectoderm is/are

Accepted Answer

A)  the nervous system and skin. 
B)  muscle tissue. 
C)  bone tissue. 
D)  the respiratory tract, urinary bladder, and urethra. 
E)  the liver and pancreas. 
A)  the nervous system and skin. 
B)  muscle tissue. 
C)  bone tissue. 
D)  the respiratory tract, urinary bladder, and urethra. 
E)  the liver and pancreas.

Question 15

Body parts derived from endoderm include

Accepted Answer

A)  epidermis of the skin, nervous tissue, and pituitary gland. 
B)  epidermis and dermis of the skin as well as hair and nails. 
C)  the urinary bladder epithelium, pancreas, and digestive tract lining. 
D)  all connective tissues, including blood, bone, and cartilage. 
E)  the linings of the blood vessels, trachea, and body cavities. 
A)  epidermis of the skin, nervous tissue, and pituitary gland. 
B)  epidermis and dermis of the skin as well as hair and nails. 
C)  the urinary bladder epithelium, pancreas, and digestive tract lining. 
D)  all connective tissues, including blood, bone, and cartilage. 
E)  the linings of the blood vessels, trachea, and body cavities.

Question 16

Two oocytes released from the same ovary at the same time and fertilized by two sperm results in

Accepted Answer

A)  identical twins. 
B)  monozygotic twins. 
C)  dizygotic twins. 
D)  blighted ova. 
E)  cloned embryos. 
A)  identical twins. 
B)  monozygotic twins. 
C)  dizygotic twins. 
D)  blighted ova. 
E)  cloned embryos.

Question 17

The number of possible chromosome combinations in a human gamete,considering independent assortment but not crossing over,is about

Accepted Answer

A)  8. 
B)  800. 
C)  80,000. 
D)  8 million. 
E)  800 million. 
A)  8. 
B)  800. 
C)  80,000. 
D)  8 million. 
E)  800 million.

Question 18

A single-gene disease that can cause symptoms in a fetus is

Accepted Answer

A)  Huntington disease. 
B)  polycystic kidney disease. 
C)  Alzheimer disease. 
D)  malaria. 
E)  osteogenesis imperfecta. 
A)  Huntington disease. 
B)  polycystic kidney disease. 
C)  Alzheimer disease. 
D)  malaria. 
E)  osteogenesis imperfecta.

Question 19

Spermatocytes and oocytes are called

Accepted Answer

A)  grommets. 
B)  marmites. 
C)  gametes. 
D)  gonads. 
E)  graphemes. 
A)  grommets. 
B)  marmites. 
C)  gametes. 
D)  gonads. 
E)  graphemes.

Question 20

Cigarette smoking during pregnancy can cause

Accepted Answer

A)  spontaneous abortion, prematurity, low birth weight, and stillbirth. 
B)  diabetes and hypertension later in the life of the offspring. 
C)  lung cancer in the fetus. 
D)  large fetal size and hypertension in the woman. 
E)  emphysema and lung cancer in the newborn. 
A)  spontaneous abortion, prematurity, low birth weight, and stillbirth. 
B)  diabetes and hypertension later in the life of the offspring. 
C)  lung cancer in the fetus. 
D)  large fetal size and hypertension in the woman. 
E)  emphysema and lung cancer in the newborn.

Exam 3: Meiosis and Development

A bulbourethral gland secretes

Thalidomide is

During the embryonic stage,the primary germ layers develop from the

Crossing over occurs during

Connective tissues are part of the primordial embryo's

The symptoms of fetal alcohol syndrome include

Meiosis in females

The ovary of a newborn girl houses about ___ primary oocytes.

Sperm undergo capacitation

The placenta

Monica takes the drug Accutane throughout her pregnancy,and her child has mental retardation and heart problems,due to the exposure.Accutane is a(n)

Rachel is excited when her pregnancy test is positive,but an ultrasound scan at 6 weeks shows no heartbeat.What might have happened is

Blastocyst cells that give rise to the embryo's body constitute the

The major body part(s)derived from ectoderm is/are

Body parts derived from endoderm include

Two oocytes released from the same ovary at the same time and fertilized by two sperm results in

The number of possible chromosome combinations in a human gamete,considering independent assortment but not crossing over,is about

A single-gene disease that can cause symptoms in a fetus is

Spermatocytes and oocytes are called

Cigarette smoking during pregnancy can cause

Overview of Genetics

Cells

Single-Gene Inheritance

Beyond Mendels Law

Matters of Sex

Multifactorial Traits

Genetics of Behavior

DNA Structure and Replication

Gene Action: From Dna to Protein

Gene Expression and Epigenetics

Gene Mutation

Chromosomes

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry

Genetics of Immunity

Genetics of Cancer

Genetic Technologies: Amplifying, Modifying, and Monitoring DNA

Genetic Testing and Treatment

Reproductive Technologies

Genomics

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