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

After birth,the baby's ductus arteriosus ____________________,which allows more blood to flow to the ____________________,which increases ____________________ circulation.

Accepted Answer

constricts

Question 3

The function of the placental hormone hCG is to maintain the ____________________ during early pregnancy.

Accepted Answer

The answer of The function of the placental hormone hCG...

Question 4

In the early embryo,the nervous system and epidermis are derived from the:

Accepted Answer

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

Question 5

Which of the following statements are true of sex-linked inheritance? (Read carefully and select all of the correct statements.)

Accepted Answer

A) The Y chromosome has more genes than does the X chromosome,and they are all dominant. 
B) A woman with one gene for a sex-linked trait is a carrier of the trait. 
C) The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is missing. 
D) The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is recessive. 
E) Men can be carriers only if the gene for the trait on the Y chromosome is recessivE.
F)A daughter acquires a sex-linked trait from both parents,but a son acquires such a trait only from his mother. 
A) The Y chromosome has more genes than does the X chromosome,and they are all dominant. 
B) A woman with one gene for a sex-linked trait is a carrier of the trait. 
C) The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is missing. 
D) The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is recessive. 
E) Men can be carriers only if the gene for the trait on the Y chromosome is recessivE.
F)A daughter acquires a sex-linked trait from both parents,but a son acquires such a trait only from his mother.

Question 6

If a trait may appear in the phenotype only when two genes for it are present,that trait is called:

Accepted Answer

A) weak 
B) recessive 
C) binomial 
D) expressive 
A) weak 
B) recessive 
C) binomial 
D) expressive

Question 7

The zygote begins a series of cell divisions called ____________________,and the process of cell division is called ____________________.

Accepted Answer

The answer of The zygote begins a series of cell...

Question 8

The union of human ____________________ and ____________________,each with ____________________ chromosomes,forms a zygote.

Accepted Answer

egg,sperm,

Question 9

For the embryo,the chorion:

Accepted Answer

A) contains fluid and absorbs shock 
B) forms the first cells of the immune system 
C) forms the fetal portion of the placenta 
D) all of these 
A) contains fluid and absorbs shock 
B) forms the first cells of the immune system 
C) forms the fetal portion of the placenta 
D) all of these

Question 10

For people,curly hair is dominant and straight hair is recessive.Genetics problem: Mom has straight hair and Dad is homozygous for curly hair.The chance that their child will have curly hair is:

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 100% 
A) 0% 
B) 25% 
C) 50% 
D) 100%

Question 11

During the ____________________ stage of labor,the amniotic sac ruptures.

Accepted Answer

The answer of During the ____________________ stage of labor,the amniotic...

Question 12

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 13

After birth,the fetal ductus arteriosus ____ so that ____ blood will flow to the fetal lungs.

Accepted Answer

A) constricts/less 
B) dilates/more 
C) constricts/more 
D) dilates/less 
A) constricts/less 
B) dilates/more 
C) constricts/more 
D) dilates/less

Question 14

Which of the following statements are true of the primary germ layers of the embryo? (Read carefully and select all of the correct statements.)

Accepted Answer

A) The ectoderm gives rise to the nervous system. 
B) Mesoderm forms most of the liver and pancreas. 
C) Bones come primarily from endoderm. 
D) The lungs are epithelial tissue from the ectoderm. 
E) The stomach lining is an inside surface and is of endodermal origin.
F)Most organs have tissues from all three germ layers. 
A) The ectoderm gives rise to the nervous system. 
B) Mesoderm forms most of the liver and pancreas. 
C) Bones come primarily from endoderm. 
D) The lungs are epithelial tissue from the ectoderm. 
E) The stomach lining is an inside surface and is of endodermal origin.
F)Most organs have tissues from all three germ layers.

Question 15

Genetics problem: Mom is homozygous for type A blood and Dad is homozygous for type B blood.The chance that their child will have type A blood is:

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 100% 
A) 0% 
B) 25% 
C) 50% 
D) 100%

Question 16

Genetics problem: Mom is homozygous for type A blood and Dad is homozygous for type B blood.The chance that their child will have type B blood is:

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 100% 
A) 0% 
B) 25% 
C) 50% 
D) 100%

Question 17

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 18

Which of the following statements are true of the infant at birth? (Read carefully and select all of the correct statements.)

Accepted Answer

A) The lungs are expanded by the first breaths and pulmonary circulation increases. 
B) The foramen ovale between the ventricles is closed. 
C) The ductus arteriosus dilates to help establish pulmonary circulation. 
D) After the umbilical cord is cut,the ductus venosus constricts. 
E) An Apgar score is an assessment only of the newborn's breathin
F)A newborn may have slight jaundice,because the liver is not fully mature. 
A) The lungs are expanded by the first breaths and pulmonary circulation increases. 
B) The foramen ovale between the ventricles is closed. 
C) The ductus arteriosus dilates to help establish pulmonary circulation. 
D) After the umbilical cord is cut,the ductus venosus constricts. 
E) An Apgar score is an assessment only of the newborn's breathin
F)A newborn may have slight jaundice,because the liver is not fully mature.

Question 19

Which of the following statements are true of the placenta and fetal circulation? (Read carefully and select all of the correct statements.)

Accepted Answer

A) The umbilical arteries carry oxygen and nutrients to the fetus. 
B) The foramen ovale permits blood to flow from the left atrium to the right atrium. 
C) The ductus venosus takes blood to the superior vena cava after bypassing the lungs. 
D) The ductus arteriosus takes blood from the aorta to the pulmonary artery. 
E) The placenta is made of both fetal and maternal tissuE.
F)Fetal carbon dioxide is brought to the placenta by the umbilical vein. 
A) The umbilical arteries carry oxygen and nutrients to the fetus. 
B) The foramen ovale permits blood to flow from the left atrium to the right atrium. 
C) The ductus venosus takes blood to the superior vena cava after bypassing the lungs. 
D) The ductus arteriosus takes blood from the aorta to the pulmonary artery. 
E) The placenta is made of both fetal and maternal tissuE.
F)Fetal carbon dioxide is brought to the placenta by the umbilical vein.

Question 20

Which of the following statements are true of dominant-recessive inheritance? (Read carefully and select all of the correct statements.)

Accepted Answer

A) A heterozygous offspring will have the dominant characteristic in the phenotype. 
B) A homozygous offspring will have the recessive characteristic in the phenotype. 
C) If a recessive trait does not appear in a family for two generations,the gene for it is no longer present. 
D) If Mom and Dad both have blue eyes,the chance for a child of theirs to have brown eyes is only 50%. 
E) If Mom and Dad both have brown eyes,the chance for a child of theirs to have blue eyes is 50%.
F)A trait is considered dominant when it is more common (frequent)in a population than its recessive counterpart. 
A) A heterozygous offspring will have the dominant characteristic in the phenotype. 
B) A homozygous offspring will have the recessive characteristic in the phenotype. 
C) If a recessive trait does not appear in a family for two generations,the gene for it is no longer present. 
D) If Mom and Dad both have blue eyes,the chance for a child of theirs to have brown eyes is only 50%. 
E) If Mom and Dad both have brown eyes,the chance for a child of theirs to have blue eyes is 50%.
F)A trait is considered dominant when it is more common (frequent)in a population than its recessive counterpart.

Exam 21: Human Development and Genetics

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

After birth,the baby's ductus arteriosus ____________________,which allows more blood to flow to the ____________________,which increases ____________________ circulation.

The function of the placental hormone hCG is to maintain the ____________________ during early pregnancy.

In the early embryo,the nervous system and epidermis are derived from the:

Which of the following statements are true of sex-linked inheritance? (Read carefully and select all of the correct statements.)

If a trait may appear in the phenotype only when two genes for it are present,that trait is called:

The zygote begins a series of cell divisions called ____________________,and the process of cell division is called ____________________.

The union of human ____________________ and ____________________,each with ____________________ chromosomes,forms a zygote.

For the embryo,the chorion:

For people,curly hair is dominant and straight hair is recessive.Genetics problem: Mom has straight hair and Dad is homozygous for curly hair.The chance that their child will have curly hair is:

During the ____________________ stage of labor,the amniotic sac ruptures.

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

After birth,the fetal ductus arteriosus ____ so that ____ blood will flow to the fetal lungs.

Which of the following statements are true of the primary germ layers of the embryo? (Read carefully and select all of the correct statements.)

Genetics problem: Mom is homozygous for type A blood and Dad is homozygous for type B blood.The chance that their child will have type A blood is:

Genetics problem: Mom is homozygous for type A blood and Dad is homozygous for type B blood.The chance that their child will have type B blood is:

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

Which of the following statements are true of the infant at birth? (Read carefully and select all of the correct statements.)

Which of the following statements are true of the placenta and fetal circulation? (Read carefully and select all of the correct statements.)

Which of the following statements are true of dominant-recessive inheritance? (Read carefully and select all of the correct statements.)

Organization and General Plan of the Body

Some Basic Chemistry

Cells

Tissues and Membranes

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The Senses

The Endocrine System

Blood

The Heart

The Vascular System

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Body Temperature and Metabolism

The Urinary System

Fluidelectrolyte and Acidbase Balance

The Reproductive Systems

An Introduction to Microbiology and Human Disease

Filters

After birth,the baby's ductus arteriosus ,which allows more blood to flow to the ,which increases circulation.

The zygote begins a series of cell divisions called ,and the process of cell division is called .

The union of human and ,each with chromosomes,forms a zygote.

After birth,the fetal ductus arteriosus so that blood will flow to the fetal lungs.