Question 1

Differentiation is

Accepted Answer

A)  the transfer of genetic information from one generation to the next. 
B)  the gradual change in anatomical and physiological characteristics from conception to maturity. 
C)  the formation of more specialized cell types through selective changes in genetic activity. 
D)  the fusion of two haploid gametes that results in one diploid zygote. 
E)  a developmental stage of the embryo where body shape becomes discernable. 
A)  the transfer of genetic information from one generation to the next. 
B)  the gradual change in anatomical and physiological characteristics from conception to maturity. 
C)  the formation of more specialized cell types through selective changes in genetic activity. 
D)  the fusion of two haploid gametes that results in one diploid zygote. 
E)  a developmental stage of the embryo where body shape becomes discernable.

Question 2

A relatively common inherited autosomal recessive disorder is

Accepted Answer

A)  Duchenne muscular dystrophy. 
B)  cystic fibrosis. 
C)  Huntington's disease. 
D)  hemophilia. 
E)  Marfan's syndrome. 
A)  Duchenne muscular dystrophy. 
B)  cystic fibrosis. 
C)  Huntington's disease. 
D)  hemophilia. 
E)  Marfan's syndrome.

Question 3

Polygenic traits include

Accepted Answer

A)  eye color and hair colors other than pure blond or red. 
B)  a lack of A and B surface antigens and presence of RH factor. 
C)  inability to roll the tongue into a U-shape and near-sightedness. 
D)  photic sneeze reflex and attached earlobes. 
E)  ability to taste phenylthiocarbamate and color blindness. 
A)  eye color and hair colors other than pure blond or red. 
B)  a lack of A and B surface antigens and presence of RH factor. 
C)  inability to roll the tongue into a U-shape and near-sightedness. 
D)  photic sneeze reflex and attached earlobes. 
E)  ability to taste phenylthiocarbamate and color blindness.

Question 4

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

Accepted Answer

A)  syncytial trophoblast 
B)  developing villi 
C)  lacuna 
D)  uterine glands 
E)  amniotic cavity 
A)  syncytial trophoblast 
B)  developing villi 
C)  lacuna 
D)  uterine glands 
E)  amniotic cavity

Question 5

The normal pair of sex chromosomes in males is

Accepted Answer

A)  XX. 
B)  XO. 
C)  YO. 
D)  XY. 
E)  YY. 
A)  XX. 
B)  XO. 
C)  YO. 
D)  XY. 
E)  YY.

Question 6

Human somatic cells contain ________ chromosomes.

Accepted Answer

A)  24, or 12 pairs of 
B)  46, or 23 pairs of 
C)  92, or 46 pairs of 
D)  12, or 6 pairs of 
E)  16, or 8 pairs of 
A)  24, or 12 pairs of 
B)  46, or 23 pairs of 
C)  92, or 46 pairs of 
D)  12, or 6 pairs of 
E)  16, or 8 pairs of

Question 7

Which of the following is an autosomal dominant inherited disorder?

Accepted Answer

A)  Huntington's disease 
B)  sickle cell anemia 
C)  Duchenne muscular dystrophy 
D)  color blindness 
E)  deafness 
A)  Huntington's disease 
B)  sickle cell anemia 
C)  Duchenne muscular dystrophy 
D)  color blindness 
E)  deafness

Question 8

Which of the following phenotypic characteristics is an example of "codominance"?

Accepted Answer

A)  normal skin pigmentation 
B)  hair color other than pure blond or red 
C)  presence of Rh factor on red blood cell membranes 
D)  presence of A or B antigens on red blood cell membranes 
E)  ability to taste phenylthiocarbamate (PT
C)  
A)  normal skin pigmentation 
B)  hair color other than pure blond or red 
C)  presence of Rh factor on red blood cell membranes 
D)  presence of A or B antigens on red blood cell membranes 
E)  ability to taste phenylthiocarbamate (PT
C)

Question 9

Joe and Jane desperately want to have children,and although they have tried for two years,they have not been successful.Finally,they both agree to consult a specialist,and it turns out that Joe suffers from oligospermia (a low sperm count).He doesn't understand why this would interfere with his ability to have children since he remembers from biology class that "it only takes one sperm to fertilize an egg." What should the specialist tell him?

Accepted Answer

Although what Joe says is technically tr

Question 10

The ectoderm forms which of the following?

Accepted Answer

A)  muscle 
B)  all lymphatic structures 
C)  the cardiovascular system 
D)  the thymus, thyroid gland, and pancreas 
E)  all neural tissues 
A)  muscle 
B)  all lymphatic structures 
C)  the cardiovascular system 
D)  the thymus, thyroid gland, and pancreas 
E)  all neural tissues

Question 11

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label C 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 12

The human genome consists of approximately 3.2 billion base pairs.Protein-coding genes represent ________ of the total genome.

Accepted Answer

A)  25 
B)  10 
C)  2 
D)  50 
E)  99 
A)  25 
B)  10 
C)  2 
D)  50 
E)  99

Question 13

The presence of ________ in blood or urine is a reliable indication of pregnancy.

Accepted Answer

A)  estrogen and progesterone 
B)  luteinizing hormone 
C)  human placental lactogen 
D)  human chorionic gonadotropin 
E)  relaxin 
A)  estrogen and progesterone 
B)  luteinizing hormone 
C)  human placental lactogen 
D)  human chorionic gonadotropin 
E)  relaxin

Question 14

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Accepted Answer

A)  codominance. 
B)  polygenic inheritance. 
C)  recessive inheritance. 
D)  sex linkage. 
E)  heterozygosity. 
A)  codominance. 
B)  polygenic inheritance. 
C)  recessive inheritance. 
D)  sex linkage. 
E)  heterozygosity.

Question 15

Hemophilia is a(n)

Accepted Answer

A)  example of dominance. 
B)  example of codominance. 
C)  polygenic trait. 
D)  recessive trait. 
E)  sex-linked trait. 
A)  example of dominance. 
B)  example of codominance. 
C)  polygenic trait. 
D)  recessive trait. 
E)  sex-linked trait.

Question 16

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

Accepted Answer

A)  blastocyst 
B)  inner cell mass 
C)  trophoblast 
D)  syncytial trophoblast 
E)  cellular trophoblast 
A)  blastocyst 
B)  inner cell mass 
C)  trophoblast 
D)  syncytial trophoblast 
E)  cellular trophoblast

Question 17

Which of the following is a recessive trait?

Accepted Answer

A)  red hair 
B)  color blindness 
C)  eye color 
D)  hemoglobin molecular structure 
E)  height 
A)  red hair 
B)  color blindness 
C)  eye color 
D)  hemoglobin molecular structure 
E)  height

Question 18

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

Accepted Answer

A)  blastocyst 
B)  inner cell mass 
C)  trophoblast 
D)  blastocoel 
E)  lacuna 
A)  blastocyst 
B)  inner cell mass 
C)  trophoblast 
D)  blastocoel 
E)  lacuna

Question 19

The period of sexual and physical maturation is (the)

Accepted Answer

A)  infancy. 
B)  childhood. 
C)  senescence. 
D)  adolescence. 
E)  neonatal period. 
A)  infancy. 
B)  childhood. 
C)  senescence. 
D)  adolescence. 
E)  neonatal period.

Question 20

Polyspermy is

Accepted Answer

A)  when fertilization involves more than one sperm. 
B)  when multiple sperm release hyaluronidase concurrently. 
C)  the movement of millions of sperm through the female reproductive tract. 
D)  the clinical term for an adequate sperm count (more than 20 million per ejaculate). 
E)  the process that follows capacitation and enables sperm to bind to sperm receptors. 
A)  when fertilization involves more than one sperm. 
B)  when multiple sperm release hyaluronidase concurrently. 
C)  the movement of millions of sperm through the female reproductive tract. 
D)  the clinical term for an adequate sperm count (more than 20 million per ejaculate). 
E)  the process that follows capacitation and enables sperm to bind to sperm receptors.

Differentiation is

A relatively common inherited autosomal recessive disorder is

Polygenic traits include

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

The normal pair of sex chromosomes in males is

Human somatic cells contain ________ chromosomes.

Which of the following is an autosomal dominant inherited disorder?

Which of the following phenotypic characteristics is an example of "codominance"?

The ectoderm forms which of the following?

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

The human genome consists of approximately 3.2 billion base pairs.Protein-coding genes represent ________ of the total genome.

The presence of ________ in blood or urine is a reliable indication of pregnancy.

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Hemophilia is a(n)

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

Which of the following is a recessive trait?

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

The period of sexual and physical maturation is (the)

Polyspermy is

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

Differentiation is

A relatively common inherited autosomal recessive disorder is

Polygenic traits include

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

The normal pair of sex chromosomes in males is

Human somatic cells contain ________ chromosomes.

Which of the following is an autosomal dominant inherited disorder?

Which of the following phenotypic characteristics is an example of "codominance"?

The ectoderm forms which of the following?

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

The human genome consists of approximately 3.2 billion base pairs.Protein-coding genes represent ________ of the total genome.

The presence of ________ in blood or urine is a reliable indication of pregnancy.

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Hemophilia is a(n)

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

Which of the following is a recessive trait?

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

The period of sexual and physical maturation is (the)

Polyspermy is

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