Question 1

The early embryonic stage that is a solid sphere of cells is the:

Accepted Answer

A) morula,and the cells are all very similar 
B) dermoblast,and the cells are all very similar 
C) morula,and the cells are in three germ layers 
D) dermoblast,and the cells are in three germ layers 
A) morula,and the cells are all very similar 
B) dermoblast,and the cells are all very similar 
C) morula,and the cells are in three germ layers 
D) dermoblast,and the cells are in three germ layers

Question 2

Which of these embryonic structures is NOT paired with the correct primary germ layer from which it develops?

Accepted Answer

A) brain - ectoderm 
B) kidneys - mesoderm 
C) lungs - ectoderm 
D) dermis - mesoderm 
A) brain - ectoderm 
B) kidneys - mesoderm 
C) lungs - ectoderm 
D) dermis - mesoderm

Question 3

The sex chromosomes in women are called:

Accepted Answer

A) XX 
B) YY 
C) XY 
D) XZ 
A) XX 
B) YY 
C) XY 
D) XZ

Question 4

A pair of chromosomes that has maternal and paternal genes for the same traits is said to be a ___ pair.

Accepted Answer

A) heterozygous 
B) homologous 
C) homogeneous 
D) heterogeneous 
A) heterozygous 
B) homologous 
C) homogeneous 
D) heterogeneous

Question 5

The embryonic membrane that has villi to provide nourishment for the early embryo is the:

Accepted Answer

A) chorion 
B) amnion 
C) yolk sac 
D) umbilical cord 
A) chorion 
B) amnion 
C) yolk sac 
D) umbilical cord

Question 6

After birth,the infant's ductus venosus constricts because:

Accepted Answer

A) more blood is returning from the lungs 
B) the umbilical arteries have been cut 
C) more blood is flowing to the lungs 
D) the umbilical vein has been cut 
A) more blood is returning from the lungs 
B) the umbilical arteries have been cut 
C) more blood is flowing to the lungs 
D) the umbilical vein has been cut

Question 7

For people,red hair is a recessive trait.In order for a child to have red hair,what must be true of the parents?

Accepted Answer

A) One parent must have red hair. 
B) Both parents must have red hair. 
C) One parent must have a gene for red hair. 
D) Both parents must have a gene for red hair. 
A) One parent must have red hair. 
B) Both parents must have red hair. 
C) One parent must have a gene for red hair. 
D) Both parents must have a gene for red hair.

Question 8

Mom and Dad have two sons and two daughters.One son is red-green color-blind.What does this tell us about Mom and Dad?

Accepted Answer

A) Dad must be color-blind,because a son gets that gene from his father. 
B) Mom must be color-blind,and passed two recessive genes to her son. 
C) Dad must be a carrier,and passed the gene to his son. 
D) Mom must be a carrier,and passed the gene to her son. 
A) Dad must be color-blind,because a son gets that gene from his father. 
B) Mom must be color-blind,and passed two recessive genes to her son. 
C) Dad must be a carrier,and passed the gene to his son. 
D) Mom must be a carrier,and passed the gene to her son.

Question 9

The site of exchanges between maternal blood and fetal blood is the:

Accepted Answer

A) umbilical arteries 
B) umbilical vein 
C) placenta 
D) myometrium 
A) umbilical arteries 
B) umbilical vein 
C) placenta 
D) myometrium

Question 10

The stem cells of a blastocyst are found in the:

Accepted Answer

A) inner cell mass 
B) outer cell mass 
C) trophoblast 
D) All of these are stem cells. 
A) inner cell mass 
B) outer cell mass 
C) trophoblast 
D) All of these are stem cells.

Question 11

Which statement is NOT true of human chromosomes?

Accepted Answer

A) The diploid number is 46. 
B) Chromosome pairs number 2 and 13 are autosomes. 
C) The sex chromosomes for women are XX. 
D) A homologous pair is either maternal or paternal. 
A) The diploid number is 46. 
B) Chromosome pairs number 2 and 13 are autosomes. 
C) The sex chromosomes for women are XX. 
D) A homologous pair is either maternal or paternal.

Question 12

In the early embryo,the liver and pancreas are derived from the:

Accepted Answer

A) ectoderm 
B) mesoderm 
C) endoderm 
D) intraderm 
A) ectoderm 
B) mesoderm 
C) endoderm 
D) intraderm

Question 13

Which statement is NOT true of the placenta and umbilical blood vessels?

Accepted Answer

A) Two umbilical arteries take blood to the fetus. 
B) Maternal blood does not mix with fetal blood in the placenta. 
C) The umbilical vein contains blood with a high level of oxygen. 
D) In the placenta,exchanges take place by diffusion and active transport. 
A) Two umbilical arteries take blood to the fetus. 
B) Maternal blood does not mix with fetal blood in the placenta. 
C) The umbilical vein contains blood with a high level of oxygen. 
D) In the placenta,exchanges take place by diffusion and active transport.

Question 14

In the early embryo,the endoderm gives rise to the:

Accepted Answer

A) nasal mucosa 
B) bones 
C) dermis 
D) pancreas 
A) nasal mucosa 
B) bones 
C) dermis 
D) pancreas

Question 15

The stage of labor during which the cervix begins to dilate is the:

Accepted Answer

A) first stage 
B) second stage 
C) third stage 
D) fourth stage 
A) first stage 
B) second stage 
C) third stage 
D) fourth stage

Question 16

In the gestation period,the period of fetal growth lasts:

Accepted Answer

A) the first 32 weeks of gestation 
B) the first 20 weeks of gestation 
C) the last 20 weeks of gestation 
D) the last 32 weeks of gestation 
A) the first 32 weeks of gestation 
B) the first 20 weeks of gestation 
C) the last 20 weeks of gestation 
D) the last 32 weeks of gestation

Exam 22:Human Development and Genetics-Part C

The early embryonic stage that is a solid sphere of cells is the:

Which of these embryonic structures is NOT paired with the correct primary germ layer from which it develops?

The sex chromosomes in women are called:

A pair of chromosomes that has maternal and paternal genes for the same traits is said to be a ___ pair.

The embryonic membrane that has villi to provide nourishment for the early embryo is the:

After birth,the infant's ductus venosus constricts because:

For people,red hair is a recessive trait.In order for a child to have red hair,what must be true of the parents?

Mom and Dad have two sons and two daughters.One son is red-green color-blind.What does this tell us about Mom and Dad?

The site of exchanges between maternal blood and fetal blood is the:

The stem cells of a blastocyst are found in the:

Which statement is NOT true of human chromosomes?

In the early embryo,the liver and pancreas are derived from the:

Which statement is NOT true of the placenta and umbilical blood vessels?

In the early embryo,the endoderm gives rise to the:

The stage of labor during which the cervix begins to dilate is the:

In the gestation period,the period of fetal growth lasts:

Organization and General Plan of the Body-Part A

Organization and General Plan of the Body-Part B

Organization and General Plan of the Body-Part C

Some Basic Chemistry-Part A

Some Basic Chemistry-Part B

Some Basic Chemistry-Part C

Cells-Part A

Cells-Part B

Cells-Part C

Tissues and Membranes-Part A

Tissues and Membranes-Part B

Tissues and Membranes-Part C

The Integumentary System-Part A

The Integumentary System-Part B

The Integumentary System-Part C

The Skeletal System-Part A

The Skeletal System-Part B

The Skeletal System-Part C

The Muscular System-Part A

The Muscular System-Part B

The Muscular System-Part C

The Nervous System-Part A

The Nervous System-Part B

The Nervous System-Part C

The Senses-Part A

The Senses-Part B

The Senses-Part C

The Endocrine System-Part A

The Endocrine System-Part B

The Endocrine System-Part C

Blood-Part A

Blood-Part B

Blood-Part C

The Heart-Part A

The Heart-Part B

The Heart-Part C

The Vascular System-Part A

The Vascular System-Part B

The Vascular System-Part C

The Lymphatic System and Immunity-Part A

The Lymphatic System and Immunity-Part B

The Lymphatic System and Immunity-Part C

The Respiratory System-Part A

The Respiratory System-Part B

The Respiratory System-Part C

The Digestive System-Part A

The Digestive System-Part B

The Digestive System-Part C

Body Temperature and Metabolism-Part A

Body Temperature and Metabolism-Part B

Body Temperature and Metabolism-Part C

The Urinary System-Part A

The Urinary System-Part B

The Urinary System-Part C

Fluid–Electrolyte and Acid–Base Balance-Part A

Fluid–Electrolyte and Acid–Base Balance-Part B

Fluid–Electrolyte and Acid–Base Balance-Part C

The Reproductive Systems-Part A

The Reproductive Systems-Part B

The Reproductive Systems-Part C

Human Development and Genetics-Part A

Human Development and Genetics-Part B

An Introduction to Microbiology and Human Disease-Part A