Question 1

The division of the zygote into two blastomeres occurs during

Accepted Answer

A) cleavage. 
B) implantation. 
C) placentation. 
D) embryogenesis. 
E) fertilization. 
A) cleavage. 
B) implantation. 
C) placentation. 
D) embryogenesis. 
E) fertilization.

Question 2

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 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

The extraembryonic membrane that contains fluid that surrounds and cushions the developing embryo and fetus is known as the

Accepted Answer

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

Question 5

Which statement regarding the neonatal renal system is true?

Accepted Answer

A) Neonates can highly concentrate urine prior to excretion. 
B) As waste products build up in venous blood, they are excreted at the kidneys. 
C) Glomerular filtration does not occur until birth. 
D) Glomerular filtration is normal. 
E) Neonatal fluid requirements are proportionally much lower than those of adults. 
A) Neonates can highly concentrate urine prior to excretion. 
B) As waste products build up in venous blood, they are excreted at the kidneys. 
C) Glomerular filtration does not occur until birth. 
D) Glomerular filtration is normal. 
E) Neonatal fluid requirements are proportionally much lower than those of adults.

Question 6

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 7

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 8

At which gestational age do basic heart structures, major blood vessels, lymph nodes, and ducts form?

Accepted Answer

A) month 6 
B) month 8 
C) month 4 
D) month 7 
E) month 2 
A) month 6 
B) month 8 
C) month 4 
D) month 7 
E) month 2

Question 9

Regarding the growth spurt in girls in the United States, the growth rate is maximal between the ages of

Accepted Answer

A) 5-9 years. 
B) 9-11 years. 
C) 10-13 years. 
D) 14-15 years. 
E) 16-18 years. 
A) 5-9 years. 
B) 9-11 years. 
C) 10-13 years. 
D) 14-15 years. 
E) 16-18 years.

Question 10

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 11

An individual who is homozygous dominant for a trait would be represented as

Accepted Answer

A) aA. 
B) aa. 
C) AA. 
D) Aa. 
E) a fusion of the different phenotypes of the given trait. 
A) aA. 
B) aa. 
C) AA. 
D) Aa. 
E) a fusion of the different phenotypes of the given trait.

Question 12

Which statement is true regarding conjoined twins?

Accepted Answer

A) Splitting of the inner cell mass may have occurred before gastrulation. 
B) Surgical separation is nearly impossible even with minor fusion. 
C) Separation of the blastomeres early in cleavage may have occurred. 
D) Splitting of the blastomeres or of the embryonic disc is not complete. 
E) Two separate oocytes are fertilized at the same time. 
A) Splitting of the inner cell mass may have occurred before gastrulation. 
B) Surgical separation is nearly impossible even with minor fusion. 
C) Separation of the blastomeres early in cleavage may have occurred. 
D) Splitting of the blastomeres or of the embryonic disc is not complete. 
E) Two separate oocytes are fertilized at the same time.

Question 13

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 14

The extraembryonic membrane that forms the urinary bladder is the

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Gastrulation produces an oval, three-layered sheet known as the

Accepted Answer

A) chorion. 
B) blastula. 
C) embryonic disc. 
D) morula. 
E) blastocyst. 
A) chorion. 
B) blastula. 
C) embryonic disc. 
D) morula. 
E) blastocyst.

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.

The division of the zygote into two blastomeres occurs during

Human somatic cells contain ________ chromosomes.

Polygenic traits include

The extraembryonic membrane that contains fluid that surrounds and cushions the developing embryo and fetus is known as the

Which statement regarding the neonatal renal system is true?

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

A relatively common inherited autosomal recessive disorder is

At which gestational age do basic heart structures, major blood vessels, lymph nodes, and ducts form?

Regarding the growth spurt in girls in the United States, the growth rate is maximal between the ages of

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

An individual who is homozygous dominant for a trait would be represented as

Which statement is true regarding conjoined twins?

Differentiation is

The extraembryonic membrane that forms the urinary bladder is the

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

Gastrulation produces an oval, three-layered sheet known as the

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

The division of the zygote into two blastomeres occurs during

Human somatic cells contain ________ chromosomes.

Polygenic traits include

The extraembryonic membrane that contains fluid that surrounds and cushions the developing embryo and fetus is known as the

Which statement regarding the neonatal renal system is true?

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

A relatively common inherited autosomal recessive disorder is

At which gestational age do basic heart structures, major blood vessels, lymph nodes, and ducts form?

Regarding the growth spurt in girls in the United States, the growth rate is maximal between the ages of

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

An individual who is homozygous dominant for a trait would be represented as

Which statement is true regarding conjoined twins?

Differentiation is

The extraembryonic membrane that forms the urinary bladder is the

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

Gastrulation produces an oval, three-layered sheet known as the

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