Question 1

An allele that is ________ will be expressed only if it is present on both chromosomes of a homologous pair.

Accepted Answer

A) dominant 
B) recessive 
C) incomplete 
D) phenotypic 
E) autosomal 
A) dominant 
B) recessive 
C) incomplete 
D) phenotypic 
E) autosomal

Question 2

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 3

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 4

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 5

Which of the following is a hormone secreted by both the placenta and the corpus luteum during pregnancy and functions in suppressing the release of oxytocin?

Accepted Answer

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

Question 6

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 7

The conversion of mammary glands from resting to active states requires the presence of both placental hormones and

Accepted Answer

A) oxytocin and insulin. 
B) progesterones and estrogens. 
C) human chorionic gonadotropin and parathyroid hormones. 
D) glucagon and somatostatin. 
E) growth hormones,prolactin,and thyroid hormones. 
A) oxytocin and insulin. 
B) progesterones and estrogens. 
C) human chorionic gonadotropin and parathyroid hormones. 
D) glucagon and somatostatin. 
E) growth hormones,prolactin,and thyroid hormones.

Question 8

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 9

-Label K 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 10

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.

Question 11

During implantation,

Accepted Answer

A) the syncytial trophoblast erodes a path through the uterine epithelium. 
B) the inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) the entire trophoblast becomes syncytial. 
E) the inner cell mass is temporarily deprived of nutrients. 
A) the syncytial trophoblast erodes a path through the uterine epithelium. 
B) the inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) the entire trophoblast becomes syncytial. 
E) the inner cell mass is temporarily deprived of nutrients.

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

"Induced" abortions

Accepted Answer

A) happen due to physiological problems. 
B) are called "miscarriages." 
C) are performed when continuing a pregnancy represents a threat to the life and health of the mother. 
D) occur due to developmental problems. 
E) are performed at the woman's request. 
A) happen due to physiological problems. 
B) are called "miscarriages." 
C) are performed when continuing a pregnancy represents a threat to the life and health of the mother. 
D) occur due to developmental problems. 
E) are performed at the woman's request.

Question 14

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 15

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 16

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 17

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 18

The portion of DNA that codes for a particular polypeptide is called a

Accepted Answer

A) genome. 
B) phenotype. 
C) karyotype. 
D) trait. 
E) gene. 
A) genome. 
B) phenotype. 
C) karyotype. 
D) trait. 
E) gene.

Question 19

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 20

What must be present for albinism to occur?

Accepted Answer

A) heterozygosity 
B) two dominant alleles 
C) sex-linked alleles 
D) two recessive alleles 
E) polygenic alleles 
A) heterozygosity 
B) two dominant alleles 
C) sex-linked alleles 
D) two recessive alleles 
E) polygenic alleles

An allele that is ________ will be expressed only if it is present on both chromosomes of a homologous pair.

Ova carry

The normal pair of sex chromosomes in males is

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

Which of the following is a hormone secreted by both the placenta and the corpus luteum during pregnancy and functions in suppressing the release of oxytocin?

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

The conversion of mammary glands from resting to active states requires the presence of both placental hormones and

Sperm carry

-Label K represents which of the following structures?

The first extraembryonic membrane to appear is the

During implantation,

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

"Induced" abortions

Differentiation is

During pregnancy,

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

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

The portion of DNA that codes for a particular polypeptide is called a

In simple inheritance,

What must be present for albinism to occur?

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

An allele that is ________ will be expressed only if it is present on both chromosomes of a homologous pair.

Ova carry

The normal pair of sex chromosomes in males is

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

Which of the following is a hormone secreted by both the placenta and the corpus luteum during pregnancy and functions in suppressing the release of oxytocin?

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

The conversion of mammary glands from resting to active states requires the presence of both placental hormones and

Sperm carry

-Label K represents which of the following structures?

The first extraembryonic membrane to appear is the

During implantation,

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

"Induced" abortions

Differentiation is

During pregnancy,

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

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

The portion of DNA that codes for a particular polypeptide is called a

In simple inheritance,

What must be present for albinism to occur?

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