Question 1

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. C

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. E

Question 3

A blastocyst is

Accepted Answer

A) an extraembryonic membrane that forms blood vessels. 
B) a solid ball of cells. 
C) a hollow ball of cells. 
D) a portion of the placenta. 
E) the membrane that forms the urinary bladder. 
A) an extraembryonic membrane that forms blood vessels. 
B) a solid ball of cells. 
C) a hollow ball of cells. 
D) a portion of the placenta. 
E) the membrane that forms the urinary bladder. C

Question 4

Which statement regarding placental circulation is true?

Accepted Answer

A) Oxygenated maternal blood re-enters the mother's venous system through chorionic villi. 
B) Maternal and fetal blood mix near the placenta. 
C) Deoxygenated maternal blood re-enters the mother's venous system through small uterine veins. 
D) Deoxygenated blood leaves the chorionic villi through umbilical arteries. 
E) Oxygenated fetal blood enters the chorionic villi through umbilical arteries. 
A) Oxygenated maternal blood re-enters the mother's venous system through chorionic villi. 
B) Maternal and fetal blood mix near the placenta. 
C) Deoxygenated maternal blood re-enters the mother's venous system through small uterine veins. 
D) Deoxygenated blood leaves the chorionic villi through umbilical arteries. 
E) Oxygenated fetal blood enters the chorionic villi through umbilical arteries.

Question 5

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 6

In polygenic inheritance,

Accepted Answer

A) phenotypic characteristics are always controlled by genes on a single chromosome. 
B) phenotypic characteristics are determined by interactions among several genes. 
C) phenotypic characteristics are determined by the genes on the Y chromosome. 
D) phenotypic characteristics are determined by a single pair of alleles. 
E) phenotypic characteristics are determined by the action of a single gene. 
A) phenotypic characteristics are always controlled by genes on a single chromosome. 
B) phenotypic characteristics are determined by interactions among several genes. 
C) phenotypic characteristics are determined by the genes on the Y chromosome. 
D) phenotypic characteristics are determined by a single pair of alleles. 
E) phenotypic characteristics are determined by the action of a single gene.

Question 7

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 8

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 9

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 10

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s).

Accepted Answer

A) first 
B) second 
C) third 
D) first and second 
E) second and third 
A) first 
B) second 
C) third 
D) first and second 
E) second and third

Question 11

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 12

If an individual carries two different alleles of the same gene,he or she is ________ for the trait determined by that gene.

Accepted Answer

A) homologous 
B) homozygous 
C) heterozygous 
D) autosomal 
E) polygenic 
A) homologous 
B) homozygous 
C) heterozygous 
D) autosomal 
E) polygenic

Question 13

Choose the correct statement about amphimixis.

Accepted Answer

A) a process that results in a zygote 
B) a genetic disorder based on autosomal dominance 
C) the transition from morula to blastocyst 
D) the time during which sperm travel toward the ovum 
E) the formation of the male and female pronuclei 
A) a process that results in a zygote 
B) a genetic disorder based on autosomal dominance 
C) the transition from morula to blastocyst 
D) the time during which sperm travel toward the ovum 
E) the formation of the male and female pronuclei

Question 14

Match the gestational age with the corresponding prenatal development.

Accepted Answer

A) 1 month / mammary glands develop 
B) 2 months / movement of fetus can be felt by mother 
C) 3 months / formation of the gonads,ducts,and genitalia 
D) 4 months / eye and ear formation 
E) 5 months / migration of lymphocytes to lymphoid organs 
A) 1 month / mammary glands develop 
B) 2 months / movement of fetus can be felt by mother 
C) 3 months / formation of the gonads,ducts,and genitalia 
D) 4 months / eye and ear formation 
E) 5 months / migration of lymphocytes to lymphoid organs

Question 15

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 16

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.

Question 17

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 18

Separation of the inner cell mass from the trophoblast forms the

Accepted Answer

A) blastocoele. 
B) lacunae. 
C) amniotic cavity. 
D) chorion. 
E) allantois. 
A) blastocoele. 
B) lacunae. 
C) amniotic cavity. 
D) chorion. 
E) allantois.

Question 19

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 20

-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

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

Regarding Fragile-X syndrome,

A blastocyst is

Which statement regarding placental circulation is true?

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

In polygenic inheritance,

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

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

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

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s).

Distortion of the cervix stimulates maternal release of which hormone?

If an individual carries two different alleles of the same gene,he or she is ________ for the trait determined by that gene.

Choose the correct statement about amphimixis.

Match the gestational age with the corresponding prenatal development.

Polyspermy is

The division of the zygote into two blastomeres occurs during

Separation of the inner cell mass from the trophoblast forms the

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

-Label H represents which of the following structures?

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

Exam 20: Development and Inheritance

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

Regarding Fragile-X syndrome,

A blastocyst is

Which statement regarding placental circulation is true?

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

In polygenic inheritance,

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

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

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

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s).

Distortion of the cervix stimulates maternal release of which hormone?

If an individual carries two different alleles of the same gene,he or she is ________ for the trait determined by that gene.

Choose the correct statement about amphimixis.

Match the gestational age with the corresponding prenatal development.

Polyspermy is

The division of the zygote into two blastomeres occurs during

Separation of the inner cell mass from the trophoblast forms the

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

-Label H represents which of the following structures?

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