Question 1

Describe the chorionic villi.

Accepted Answer

A) The chorionic villi contain fluid that surrounds and cushions the embryo or fetus. 
B) The chorionic villi forms the interface between the embryonic/fetal system and the amniotic fluid. 
C) The chorionic villi forms the umbilical cord. 
D) The chorionic villi are structures that extend into the maternal tissues through which maternal blood flows. 
E) The chorionic villi form the yolk sac. 
A) The chorionic villi contain fluid that surrounds and cushions the embryo or fetus. 
B) The chorionic villi forms the interface between the embryonic/fetal system and the amniotic fluid. 
C) The chorionic villi forms the umbilical cord. 
D) The chorionic villi are structures that extend into the maternal tissues through which maternal blood flows. 
E) The chorionic villi form the yolk sac.

Question 2

During gastrulation,

Accepted Answer

A) the blastomeres fuse. 
B) the placenta penetrates the endometrium. 
C) three germ layers are formed. 
D) blastomeres form. 
E) the neural tube closes. 
A) the blastomeres fuse. 
B) the placenta penetrates the endometrium. 
C) three germ layers are formed. 
D) blastomeres form. 
E) the neural tube closes.

Question 3

Figure 27-1
-Identify the structures labeled "4."

Accepted Answer

A) zygotic twins 
B) morula 
C) blastomere 
D) trophoblast 
E) polar bodies 
A) zygotic twins 
B) morula 
C) blastomere 
D) trophoblast 
E) polar bodies

Question 4

Figure 27-2
-Identify the structure labeled "5."

Accepted Answer

A) amniotic cavity 
B) chorion 
C) amnion 
D) placenta 
E) endometrium 
A) amniotic cavity 
B) chorion 
C) amnion 
D) placenta 
E) endometrium

Question 5

Figure 27-1
-Identify the stage labeled "12."

Accepted Answer

A) zygote 
B) morula 
C) blastocyst 
D) trophoblast 
E) cytotrophoblast 
A) zygote 
B) morula 
C) blastocyst 
D) trophoblast 
E) cytotrophoblast

Question 6

Compare the body stalk with the yolk stalk.

Accepted Answer

The body stalk is the connection between

Question 7

Identify what process is occurring at the structure labeled "6."

Accepted Answer

A) fertilization 
B) ovulation 
C) cleavage 
D) migration 
E) gastrulation 
A) fertilization 
B) ovulation 
C) cleavage 
D) migration 
E) gastrulation

Question 8

Definehomozygous and heterozygous.

Accepted Answer

A) Homozygous means homologous chromosomes has the same genes.Heterozygous means homologous chromosomes has different genes. 
B) Homozygous means homologous chromosomes has different genes.Heterozygous means homologous chromosomes has the same genes. 
C) Homozygous means that homologous chromosomes carry the same allele of a given gene.Heterozygous means that homologous chromosomes carry different alleles of a given gene. 
D) Homozygous means that homologous chromosomes carry different alleles of a given gene.Heterozygous means that homologous chromosomes carry the same allele of a given gene. 
E) Homozygous means that all genes are on the same locus.Heterozygous means that all genes are on different loci. 
A) Homozygous means homologous chromosomes has the same genes.Heterozygous means homologous chromosomes has different genes. 
B) Homozygous means homologous chromosomes has different genes.Heterozygous means homologous chromosomes has the same genes. 
C) Homozygous means that homologous chromosomes carry the same allele of a given gene.Heterozygous means that homologous chromosomes carry different alleles of a given gene. 
D) Homozygous means that homologous chromosomes carry different alleles of a given gene.Heterozygous means that homologous chromosomes carry the same allele of a given gene. 
E) Homozygous means that all genes are on the same locus.Heterozygous means that all genes are on different loci.

Question 9

Name the three stages of labor,and describe the events that characterize each stage.

Accepted Answer

The dilation stage begins with the onset

Question 10

The inner cell mass of the blastocyst will

Accepted Answer

A) form the placenta. 
B) form the morula. 
C) form the embryo. 
D) form blood vessels of the placenta. 
E) provide nutrients for early growth. 
A) form the placenta. 
B) form the morula. 
C) form the embryo. 
D) form blood vessels of the placenta. 
E) provide nutrients for early growth.

Question 11

The neonatal period extends

Accepted Answer

A) for the first 24 hours of life. 
B) for the first month of life. 
C) until the first birthday. 
D) from day 1 until day 60. 
E) until breast feeding stops. 
A) for the first 24 hours of life. 
B) for the first month of life. 
C) until the first birthday. 
D) from day 1 until day 60. 
E) until breast feeding stops.

Question 12

All of the following occur during pregnancy except

Accepted Answer

A) a woman's respiratory rate and tidal volume increase. 
B) maternal blood volume increases. 
C) maternal nutrient requirements increase. 
D) a woman's glomerular filtration rate increases. 
E) a woman's bladder capacity increases. 
A) a woman's respiratory rate and tidal volume increase. 
B) maternal blood volume increases. 
C) maternal nutrient requirements increase. 
D) a woman's glomerular filtration rate increases. 
E) a woman's bladder capacity increases.

Question 13

The almost identical cells produced by cleavage divisions are called

Accepted Answer

A) morulas. 
B) blastomeres. 
C) trophoblasts. 
D) blastocoeles. 
E) ova. 
A) morulas. 
B) blastomeres. 
C) trophoblasts. 
D) blastocoeles. 
E) ova.

Question 14

Identify the chromosome pair involved in each of the following disorders: (1)ovarian cancer,(2)Tay-Sachs disease,and (3)spinocerebellar ataxia.

Accepted Answer

(1)ovarian cancer - chromosome

Question 15

The trait "freckles" operates through strict dominance.What would be the phenotype of a person who is heterozygous for this trait?

Accepted Answer

A) The person would have the dominant allele for freckles but the phenotype would be "no freckles." 
B) The person would have the dominant allele for freckles and the phenotype would be "freckles." 
C) The person would not have the dominant allele for freckles and the phenotype would be "no freckles." 
D) The person would not have the dominant allele for freckles but the phenotype would be "freckles." 
E) The person would have only dominant alleles for freckles but the phenotype would be "no freckles." 
A) The person would have the dominant allele for freckles but the phenotype would be "no freckles." 
B) The person would have the dominant allele for freckles and the phenotype would be "freckles." 
C) The person would not have the dominant allele for freckles and the phenotype would be "no freckles." 
D) The person would not have the dominant allele for freckles but the phenotype would be "freckles." 
E) The person would have only dominant alleles for freckles but the phenotype would be "no freckles."

Question 16

The gradual modification of anatomical structures during the period from conception to maturity is

Accepted Answer

A) development. 
B) differentiation. 
C) embryogenesis. 
D) capacitation. 
E) All of the answers are correct. 
A) development. 
B) differentiation. 
C) embryogenesis. 
D) capacitation. 
E) All of the answers are correct.

Question 17

After fertilization,the first cell division is completed

Accepted Answer

A) within a few seconds. 
B) within the hour. 
C) about 6 hours later. 
D) in 12 hours. 
E) more than a day later. 
A) within a few seconds. 
B) within the hour. 
C) about 6 hours later. 
D) in 12 hours. 
E) more than a day later.

Question 18

Which of the following does not describe non-sex chromosomes?

Accepted Answer

A) diploid 
B) haploid 
C) produced by mitosis 
D) genetically identical 
E) called somatic cells 
A) diploid 
B) haploid 
C) produced by mitosis 
D) genetically identical 
E) called somatic cells

Question 19

Define single nucleotide polymorphism.

Accepted Answer

A) A single nucleotide polymorphism is the presence of a single gene at one locus. 
B) A single nucleotide polymorphism is a variation in a single base pair in a DNA sequence. 
C) A single nucleotide polymorphism is a truncated chromosome. 
D) A single nucleotide polymorphism is a missing chromosome in a set. 
E) A single nucleotide polymorphism is when a single nucleotide controls the allele's phenotypic expression. 
A) A single nucleotide polymorphism is the presence of a single gene at one locus. 
B) A single nucleotide polymorphism is a variation in a single base pair in a DNA sequence. 
C) A single nucleotide polymorphism is a truncated chromosome. 
D) A single nucleotide polymorphism is a missing chromosome in a set. 
E) A single nucleotide polymorphism is when a single nucleotide controls the allele's phenotypic expression.

Question 20

Figure 27-2
-Identify the structure labeled "3."

Accepted Answer

A) umbilical cord 
B) placenta 
C) myometrium 
D) amniotic cavity 
E) yolk sac 
A) umbilical cord 
B) placenta 
C) myometrium 
D) amniotic cavity 
E) yolk sac

Exam 27: Development and Inheritance

Describe the chorionic villi.

During gastrulation,

Figure 27-1 -Identify the structures labeled "4."

Figure 27-2 -Identify the structure labeled "5."

Figure 27-1 -Identify the stage labeled "12."

Compare the body stalk with the yolk stalk.

Identify what process is occurring at the structure labeled "6."

Definehomozygous and heterozygous.

Name the three stages of labor,and describe the events that characterize each stage.

The inner cell mass of the blastocyst will

The neonatal period extends

All of the following occur during pregnancy except

The almost identical cells produced by cleavage divisions are called

Identify the chromosome pair involved in each of the following disorders: (1)ovarian cancer,(2)Tay-Sachs disease,and (3)spinocerebellar ataxia.

The trait "freckles" operates through strict dominance.What would be the phenotype of a person who is heterozygous for this trait?

The gradual modification of anatomical structures during the period from conception to maturity is

After fertilization,the first cell division is completed

Which of the following does not describe non-sex chromosomes?

Define single nucleotide polymorphism.

Figure 27-2 -Identify the structure labeled "3."

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Cellular Level of Organization

Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Skeleton

Joints

Skeletal Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain, cranial Nerves, and Sensory and Motor Pathways

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Heart and Cardiovascular Function

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, nutrition, and Energetics

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

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