Question 1

Near the end of the first trimester,deoxygenated blood flows from the developing embryo or fetus to the placenta through

Accepted Answer

A)  paired umbilical veins. 
B)  the superior vena cava. 
C)  one umbilical vein. 
D)  three umbilical arteries. 
E)  paired umbilical arteries. 
A)  paired umbilical veins. 
B)  the superior vena cava. 
C)  one umbilical vein. 
D)  three umbilical arteries. 
E)  paired umbilical arteries.

Question 2

Regarding Fragile-X syndrome,

Accepted Answer

A)  the affected females have nonfunctional ovaries, and estrogen production occurs at negligible levels. 
B)  the cause is trisomy, a mistake that occurs in meiosis, and affected individuals carry an extra chromosome. 
C)  the phenotype is male, but the testes fail to mature so the individuals are sterile, and the breasts are slightly enlarged. 
D)  the cause is a kind of chromosomal deletion known as monosomy where the phenotype is normal female. 
E)  the affected individuals display mental retardation, abnormal facial development, and enlarged testes in affected males. 
A)  the affected females have nonfunctional ovaries, and estrogen production occurs at negligible levels. 
B)  the cause is trisomy, a mistake that occurs in meiosis, and affected individuals carry an extra chromosome. 
C)  the phenotype is male, but the testes fail to mature so the individuals are sterile, and the breasts are slightly enlarged. 
D)  the cause is a kind of chromosomal deletion known as monosomy where the phenotype is normal female. 
E)  the affected individuals display mental retardation, abnormal facial development, and enlarged testes in affected males.

Question 3

Genes that appear on the X chromosome are said to be

Accepted Answer

A)  X-linked. 
B)  autosomal recessive. 
C)  heterozygous. 
D)  homologous. 
E)  lethal. 
A)  X-linked. 
B)  autosomal recessive. 
C)  heterozygous. 
D)  homologous. 
E)  lethal.

Question 4

During pregnancy,

Accepted Answer

A)  maternal respiratory rate decreases. 
B)  maternal blood volume decreases. 
C)  maternal nutrient requirements decrease significantly. 
D)  a woman's glomerular filtration rate decreases by 20 percent. 
E)  maternal tidal volume increases. 
A)  maternal respiratory rate decreases. 
B)  maternal blood volume decreases. 
C)  maternal nutrient requirements decrease significantly. 
D)  a woman's glomerular filtration rate decreases by 20 percent. 
E)  maternal tidal volume increases.

Question 5

Regarding lactation and the mammary glands,which statement is true?

Accepted Answer

A)  Colostrum contains more proteins than breast milk. 
B)  An expectant mother's mammary glands begin producing colostrum by the end of the second month of pregnancy. 
C)  As colostrum production increases, the mammary glands convert to milk production. 
D)  Colostrum, unlike milk, contains large quantities of lysozymes. 
E)  Colostrum has much more fat than breast milk. 
A)  Colostrum contains more proteins than breast milk. 
B)  An expectant mother's mammary glands begin producing colostrum by the end of the second month of pregnancy. 
C)  As colostrum production increases, the mammary glands convert to milk production. 
D)  Colostrum, unlike milk, contains large quantities of lysozymes. 
E)  Colostrum has much more fat than breast milk.

Question 6

In simple inheritance,

Accepted Answer

A)  phenotypic characteristics are determined by a single pair of alleles. 
B)  phenotypic characteristics are determined by multiple alleles. 
C)  phenotypic characteristics are determined by the action of two genes. 
D)  phenotypic characteristics are controlled by regulator genes on a chromosome other than the one that has the structural genes. 
E)  phenotypic characteristics are determined by the genes on the Y chromosome. 
A)  phenotypic characteristics are determined by a single pair of alleles. 
B)  phenotypic characteristics are determined by multiple alleles. 
C)  phenotypic characteristics are determined by the action of two genes. 
D)  phenotypic characteristics are controlled by regulator genes on a chromosome other than the one that has the structural genes. 
E)  phenotypic characteristics are determined by the genes on the Y chromosome.

Question 7

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label B represents which of the following structures?

Accepted Answer

A)  blastocoele 
B)  blastocyst 
C)  trophoblast 
D)  developing villi 
E)  chorion 
A)  blastocoele 
B)  blastocyst 
C)  trophoblast 
D)  developing villi 
E)  chorion

Question 8

If the parents are AA and aa,the offspring are all expected to be

Accepted Answer

A)  sterile. 
B)  Aa. 
C)  AA. 
D)  aa. 
E)  either AA or aa. 
A)  sterile. 
B)  Aa. 
C)  AA. 
D)  aa. 
E)  either AA or aa.

Question 9

The purpose of the Human Genome Project (HGP)is to

Accepted Answer

A)  identify alleles for research in the field of autosomal recessive diseases. 
B)  describe the full set of genetic material in human chromosomes. 
C)  discover new methods for fingerprinting and other forensic methods. 
D)  create a "master race" by limiting the gene pool to carriers of desirable genes. 
E)  study human development and to ultimately find a way to slow down senescence. 
A)  identify alleles for research in the field of autosomal recessive diseases. 
B)  describe the full set of genetic material in human chromosomes. 
C)  discover new methods for fingerprinting and other forensic methods. 
D)  create a "master race" by limiting the gene pool to carriers of desirable genes. 
E)  study human development and to ultimately find a way to slow down senescence.

Question 10

Which of the following is a major hormonal event at the onset of puberty?

Accepted Answer

A)  The hypothalamus decreases its production of GnRH. 
B)  Circulating levels of FSH decrease rapidly. 
C)  Ovarian cells become less sensitive to FSH. 
D)  Testicular cells become less sensitive to LH and FSH. 
E)  Pituitary gland cells become more sensitive to GnRH. 
A)  The hypothalamus decreases its production of GnRH. 
B)  Circulating levels of FSH decrease rapidly. 
C)  Ovarian cells become less sensitive to FSH. 
D)  Testicular cells become less sensitive to LH and FSH. 
E)  Pituitary gland cells become more sensitive to GnRH.

Question 11

When labor begins,the fetal pituitary gland secretes ________,which may be the actual trigger for the onset of labor.

Accepted Answer

A)  prolactin 
B)  hCG 
C)  oxytocin 
D)  growth hormone 
E)  thyroxine 
A)  prolactin 
B)  hCG 
C)  oxytocin 
D)  growth hormone 
E)  thyroxine

Question 12

Ova carry

Accepted Answer

A)  one X sex chromosome. 
B)  XX sex chromosomes. 
C)  YY sex chromosomes. 
D)  XO sex chromosomes. 
E)  one Y sex chromosome. 
A)  one X sex chromosome. 
B)  XX sex chromosomes. 
C)  YY sex chromosomes. 
D)  XO sex chromosomes. 
E)  one Y sex chromosome.

Question 13

Distortion of the cervix stimulates maternal release of which hormone?

Accepted Answer

A)  estrogen 
B)  progesterone 
C)  oxytocin 
D)  relaxin 
E)  human chorionic gonadotropin 
A)  estrogen 
B)  progesterone 
C)  oxytocin 
D)  relaxin 
E)  human chorionic gonadotropin

Question 14

Which process begins as the surface of the blastocyst next to the inner cell mass adheres to the uterine lining?

Accepted Answer

A)  oocyte activation 
B)  placentation 
C)  embryogenesis 
D)  implantation 
E)  blastocyst formation 
A)  oocyte activation 
B)  placentation 
C)  embryogenesis 
D)  implantation 
E)  blastocyst formation

Question 15

Neural tube formation occurs during which gestational age?

Accepted Answer

A)  4 months 
B)  2 weeks 
C)  1 month 
D)  9 weeks 
E)  5 months 
A)  4 months 
B)  2 weeks 
C)  1 month 
D)  9 weeks 
E)  5 months

Question 16

When two separate oocytes are ovulated and fertilized,________ develop.

Accepted Answer

A)  identical twins 
B)  conjoined twins 
C)  monozygotic twins 
D)  polygametic twins 
E)  dizygotic twins 
A)  identical twins 
B)  conjoined twins 
C)  monozygotic twins 
D)  polygametic twins 
E)  dizygotic twins

Question 17

The outer layer of cells separating the outside world from the blastocoele is called the

Accepted Answer

A)  trophoblast. 
B)  chorion. 
C)  inner cell mass. 
D)  zona pellucida. 
E)  blastomere. 
A)  trophoblast. 
B)  chorion. 
C)  inner cell mass. 
D)  zona pellucida. 
E)  blastomere.

Question 18

The mesoderm forms (the)

Accepted Answer

A)  muscle. 
B)  epidermis. 
C)  neural tissues. 
D)  mucous epithelium of nasal passageways. 
E)  pituitary gland and adrenal medullae. 
A)  muscle. 
B)  epidermis. 
C)  neural tissues. 
D)  mucous epithelium of nasal passageways. 
E)  pituitary gland and adrenal medullae.

Question 19

Sperm carry

Accepted Answer

A)  only one X sex chromosome, exclusively. 
B)  only one Y sex chromosome, exclusively. 
C)  no sex chromosomes. 
D)  two Y sex chromosomes. 
E)  one X or one Y sex chromosome. 
A)  only one X sex chromosome, exclusively. 
B)  only one Y sex chromosome, exclusively. 
C)  no sex chromosomes. 
D)  two Y sex chromosomes. 
E)  one X or one Y sex chromosome.

Question 20

The first extraembryonic membrane to appear is the

Accepted Answer

A)  chorion. 
B)  allantois. 
C)  placenta. 
D)  yolk sac. 
E)  amnion. 
A)  chorion. 
B)  allantois. 
C)  placenta. 
D)  yolk sac. 
E)  amnion.

Near the end of the first trimester,deoxygenated blood flows from the developing embryo or fetus to the placenta through

Regarding Fragile-X syndrome,

Genes that appear on the X chromosome are said to be

During pregnancy,

Regarding lactation and the mammary glands,which statement is true?

In simple inheritance,

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label B represents which of the following structures?

If the parents are AA and aa,the offspring are all expected to be

The purpose of the Human Genome Project (HGP)is to

Which of the following is a major hormonal event at the onset of puberty?

When labor begins,the fetal pituitary gland secretes ________,which may be the actual trigger for the onset of labor.

Ova carry

Distortion of the cervix stimulates maternal release of which hormone?

Which process begins as the surface of the blastocyst next to the inner cell mass adheres to the uterine lining?

Neural tube formation occurs during which gestational age?

When two separate oocytes are ovulated and fertilized,________ develop.

The outer layer of cells separating the outside world from the blastocoele is called the

The mesoderm forms (the)

Sperm carry

The first extraembryonic membrane to appear is the

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: The Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

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Exam 20: Development and Inheritance

Near the end of the first trimester,deoxygenated blood flows from the developing embryo or fetus to the placenta through

Regarding Fragile-X syndrome,

Genes that appear on the X chromosome are said to be

During pregnancy,

Regarding lactation and the mammary glands,which statement is true?

In simple inheritance,

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label B represents which of the following structures?

If the parents are AA and aa,the offspring are all expected to be

The purpose of the Human Genome Project (HGP)is to

Which of the following is a major hormonal event at the onset of puberty?

When labor begins,the fetal pituitary gland secretes ________,which may be the actual trigger for the onset of labor.

Ova carry

Distortion of the cervix stimulates maternal release of which hormone?

Which process begins as the surface of the blastocyst next to the inner cell mass adheres to the uterine lining?

Neural tube formation occurs during which gestational age?

When two separate oocytes are ovulated and fertilized,________ develop.

The outer layer of cells separating the outside world from the blastocoele is called the

The mesoderm forms (the)

Sperm carry

The first extraembryonic membrane to appear is the

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: The Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

Filters