Question 1

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 2

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 3

For the embryo,the yolk sac:

Accepted Answer

A) provides a cushion 
B) forms the first blood cells 
C) provides nourishment 
D) forms the fetal portion of the placenta 
A) provides a cushion 
B) forms the first blood cells 
C) provides nourishment 
D) forms the fetal portion of the placenta

Question 4

The function of the hormone hCG is to:

Accepted Answer

A) inhibit the anterior pituitary gland 
B) promote rapid growth of the embryo 
C) stop the secretion of FSH and LH during pregnancy 
D) stimulate the corpus luteum to secrete estrogen and progesterone 
A) inhibit the anterior pituitary gland 
B) promote rapid growth of the embryo 
C) stop the secretion of FSH and LH during pregnancy 
D) stimulate the corpus luteum to secrete estrogen and progesterone

Question 5

The placental hormone that maintains the corpus luteum during early pregnancy is:

Accepted Answer

A) hCG 
B) estrogen 
C) FSH 
D) progesterone 
A) hCG 
B) estrogen 
C) FSH 
D) progesterone

Question 6

The umbilical arteries contain blood that has:

Accepted Answer

A) a high level of carbon dioxide and nutrients 
B) a high level of oxygen and nutrients 
C) a high level of oxygen and waste products 
D) a high level of carbon dioxide and waste products 
A) a high level of carbon dioxide and nutrients 
B) a high level of oxygen and nutrients 
C) a high level of oxygen and waste products 
D) a high level of carbon dioxide and waste products

Question 7

The hormone that causes strong contractions of the uterus during labor is:

Accepted Answer

A) oxytocin 
B) estrogen 
C) hCG 
D) progesterone 
A) oxytocin 
B) estrogen 
C) hCG 
D) progesterone

Question 8

If a trait may appear in the phenotype when only one gene for it is present,that trait is called:

Accepted Answer

A) dominant 
B) strong 
C) recessive 
D) homozygous 
A) dominant 
B) strong 
C) recessive 
D) homozygous

Question 9

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

Accepted Answer

A) epidermis - ectoderm 
B) liver - endoderm 
C) heart - mesoderm 
D) skeletal muscles - ectoderm 
A) epidermis - ectoderm 
B) liver - endoderm 
C) heart - mesoderm 
D) skeletal muscles - ectoderm

Question 10

A human cell contains how many pairs of autosomes?

Accepted Answer

A) 22 pairs 
B) 23 pairs 
C) 44 pairs 
D) 46 pairs 
A) 22 pairs 
B) 23 pairs 
C) 44 pairs 
D) 46 pairs

Question 11

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 12

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

Accepted Answer

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

Question 13

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind.What is the chance that their son will be color-blind?

Accepted Answer

A) 0% 
B) 50% 
C) 75% 
D) 100% 
A) 0% 
B) 50% 
C) 75% 
D) 100%

Question 14

The average gestation period lasts:

Accepted Answer

A) 36 weeks 
B) 40 weeks 
C) 46 weeks 
D) 50 weeks 
A) 36 weeks 
B) 40 weeks 
C) 46 weeks 
D) 50 weeks

Question 15

The umbilical vein contains blood that has:

Accepted Answer

A) a high level of carbon dioxide and nutrients 
B) a high level of oxygen and nutrients 
C) a high level of oxygen and waste products 
D) a high level of carbon dioxide and waste products 
A) a high level of carbon dioxide and nutrients 
B) a high level of oxygen and nutrients 
C) a high level of oxygen and waste products 
D) a high level of carbon dioxide and waste products

Question 16

Mom and Dad both have type A blood.Their first child has type O blood.What does this tell us about Mom and Dad?

Accepted Answer

A) One of them must have an O gene. 
B) Both of them must have an O gene. 
C) One of them must be heterozygous type A. 
D) Both of them must be homozygous type A. 
A) One of them must have an O gene. 
B) Both of them must have an O gene. 
C) One of them must be heterozygous type A. 
D) Both of them must be homozygous type A.

Question 17

In order for a recessive trait to appear in the phenotype:

Accepted Answer

A) no genes for it can be present 
B) two genes for it must be present 
C) one gene for it must be present 
D) one or two genes for it must be present 
A) no genes for it can be present 
B) two genes for it must be present 
C) one gene for it must be present 
D) one or two genes for it must be present

Question 18

An ectopic pregnancy is one in which:

Accepted Answer

A) fertilization is delayed 
B) cleavage is very slow 
C) the stem cells do not specialize as they should 
D) the blastocyst becomes implanted outside the uterus 
A) fertilization is delayed 
B) cleavage is very slow 
C) the stem cells do not specialize as they should 
D) the blastocyst becomes implanted outside the uterus

Question 19

Which statement is NOT true of genes?

Accepted Answer

A) Heterozygous means that two different genes are present for a trait. 
B) Homozygous means that two similar genes are present for a trait. 
C) The genotype is the genes that are present. 
D) The phenotype is the genes that are absent. 
A) Heterozygous means that two different genes are present for a trait. 
B) Homozygous means that two similar genes are present for a trait. 
C) The genotype is the genes that are present. 
D) The phenotype is the genes that are absent.

Question 20

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind.What is the chance that their daughter will be a carrier?

Accepted Answer

A) 0% 
B) 50% 
C) 75% 
D) 100% 
A) 0% 
B) 50% 
C) 75% 
D) 100%

Exam 22:Human Development and Genetics-Part C

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:

For the embryo,the yolk sac:

The function of the hormone hCG is to:

The placental hormone that maintains the corpus luteum during early pregnancy is:

The umbilical arteries contain blood that has:

The hormone that causes strong contractions of the uterus during labor is:

If a trait may appear in the phenotype when only one gene for it is present,that trait is called:

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

A human cell contains how many pairs of autosomes?

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:

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

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind.What is the chance that their son will be color-blind?

The average gestation period lasts:

The umbilical vein contains blood that has:

Mom and Dad both have type A blood.Their first child has type O blood.What does this tell us about Mom and Dad?

In order for a recessive trait to appear in the phenotype:

An ectopic pregnancy is one in which:

Which statement is NOT true of genes?

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind.What is the chance that their daughter will be a carrier?

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