Question 1

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label F represents which of the following structures?

Accepted Answer

A)   blastocyst
B)   inner cell mass
C)   trophoblast
D)   syncytial trophoblast
E)   cellular trophoblastF) B) and D)
G) C) and D)

Question 2

Human somatic cells contain ________ chromosomes.

Accepted Answer

A)   24, or 12 pairs of
B)   46, or 23 pairs of
C)   92, or 46 pairs of
D)   12, or 6 pairs of
E)   16, or 8 pairs ofF) A) and D)
G) A) and C)

Question 3

The normal pair of sex chromosomes in males is

Accepted Answer

A)   XX.
B)   XO.
C)   YO.
D)   XY.
E)   YY.F) C) and D)
G) B) and E)

Question 4

Hemophilia is a(n)

Accepted Answer

A)   example of dominance.
B)   example of codominance.
C)   polygenic trait.
D)   recessive trait.
E)   sex-linked trait.F) A) and B)
G) B) and E)

Question 5

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)   99F) None of the above
G) A) and E)

Question 6

Which of the following is an autosomal dominant inherited disorder?

Accepted Answer

A)   Huntington's disease
B)   sickle cell anemia
C)   Duchenne muscular dystrophy
D)   color blindness
E)   deafnessF) A) and B)
G) B) and E)

Question 7

Which of the following phenotypic characteristics is an example of "codominance"?

Accepted Answer

A)   normal skin pigmentation
B)   hair color other than pure blond or red
C)   presence of Rh factor on red blood cell membranes
D)   presence of A or B antigens on red blood cell membranes
E)   ability to taste phenylthiocarbamate (PT
C)  F) B) and D)
G) A) and D)

Question 8

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label C represents which of the following structures?

Accepted Answer

A)   blastocoele
B)   blastocyst
C)   trophoblast
D)   developing villi
E)   chorionF) A) and B)
G) A) and C)

Question 9

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.F) C) and D)
G) A) and B)

Question 10

Polyspermy is

Accepted Answer

A)   when fertilization involves more than one sperm.
B)   when multiple sperm release hyaluronidase concurrently.
C)   the movement of millions of sperm through the female reproductive tract.
D)   the clinical term for an adequate sperm count (more than 20 million per ejaculate) .
E)   the process that follows capacitation and enables sperm to bind to sperm receptors.F) B) and D)
G) C) and D)

Question 11

Which of the following is a recessive trait?

Accepted Answer

A)   red hair
B)   color blindness
C)   eye color
D)   hemoglobin molecular structure
E)   heightF) A) and E)
G) A) and D)

Question 12

A relatively common inherited autosomal recessive disorder is

Accepted Answer

A)   Duchenne muscular dystrophy.
B)   cystic fibrosis.
C)   Huntington's disease.
D)   hemophilia.
E)   Marfan's syndrome.F) All of the above
G) A) and D)

Question 13

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label A represents which of the following structures?

Accepted Answer

A)   syncytial trophoblast
B)   developing villi
C)   lacuna
D)   uterine glands
E)   amniotic cavityF) A) and B)
G) A) and C)

Question 14

The ectoderm forms which of the following?

Accepted Answer

A)   muscle
B)   all lymphatic structures
C)   the cardiovascular system
D)   the thymus, thyroid gland, and pancreas
E)   all neural tissuesF) A) and B)
G) B) and E)

Question 15

Joe and Jane desperately want to have children,and although they have tried for two years,they have not been successful.Finally,they both agree to consult a specialist,and it turns out that Joe suffers from oligospermia (a low sperm count).He doesn't understand why this would interfere with his ability to have children since he remembers from biology class that "it only takes one sperm to fertilize an egg." What should the specialist tell him?

Accepted Answer

Although what Joe says is technically tr...

Question 16

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)   relaxinF) All of the above
G) A) and C)

Question 17

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label H represents which of the following structures?

Accepted Answer

A)   blastocyst
B)   inner cell mass
C)   trophoblast
D)   blastocoel
E)   lacunaF) C) and E)
G) B) and C)

Question 18

The period of sexual and physical maturation is (the)

Accepted Answer

A)   infancy.
B)   childhood.
C)   senescence.
D)   adolescence.
E)   neonatal period.F) B) and C)
G) A) and E)

Question 19

Polygenic traits include

Accepted Answer

A)   eye color and hair colors other than pure blond or red.
B)   a lack of A and B surface antigens and presence of RH factor.
C)   inability to roll the tongue into a U-shape and near-sightedness.
D)   photic sneeze reflex and attached earlobes.
E)   ability to taste phenylthiocarbamate and color blindness.F) B) and D)
G) D) and E)

Question 20

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Accepted Answer

A)   codominance.
B)   polygenic inheritance.
C)   recessive inheritance.
D)   sex linkage.
E)   heterozygosity.F) B) and C)
G) C) and E)

Exam 20: Development and Inheritance

The period of sexual and physical maturation is (the)

Correct Answer
verified

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Correct Answer
verified

A relatively common inherited autosomal recessive disorder is

Correct Answer
verified

The normal pair of sex chromosomes in males is

Correct Answer
verified

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label F represents which of the following structures?

Correct Answer
verified

Human somatic cells contain ________ chromosomes.

Correct Answer
verified

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label C represents which of the following structures?

Correct Answer
verified

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label A represents which of the following structures?

Correct Answer
verified

Differentiation is

Correct Answer
verified

Which of the following is a recessive trait?

Correct Answer
verified

Hemophilia is a(n)

Correct Answer
verified

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

Correct Answer
verified

Polygenic traits include

Correct Answer
verified

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label H represents which of the following structures?

Correct Answer
verified

The ectoderm forms which of the following?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is an autosomal dominant inherited disorder?

Correct Answer
verified

Polyspermy is

Correct Answer
verified

Correct Answer
verified
Although what Joe says is technically tr...
View Answer

Which of the following phenotypic characteristics is an example of "codominance"?

Correct Answer
verified

Exam 20: Development and Inheritance

The period of sexual and physical maturation is (the)

Correct AnswerverifiedShow Answer

When the alleles of a gene are both expressed equally,the alleles show a form of inheritance called

Correct AnswerverifiedShow Answer

A relatively common inherited autosomal recessive disorder is

Correct AnswerverifiedShow Answer

The normal pair of sex chromosomes in males is

Correct AnswerverifiedShow Answer

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label F represents which of the following structures?

Correct AnswerverifiedShow Answer

Human somatic cells contain ________ chromosomes.

Correct AnswerverifiedShow Answer

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label C represents which of the following structures?

Correct AnswerverifiedShow Answer

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label A represents which of the following structures?

Correct AnswerverifiedShow Answer

Differentiation is

Correct AnswerverifiedShow Answer

Which of the following is a recessive trait?

Correct AnswerverifiedShow Answer

Hemophilia is a(n)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Polygenic traits include

Correct AnswerverifiedShow Answer

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label H represents which of the following structures?

Correct AnswerverifiedShow Answer

The ectoderm forms which of the following?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is an autosomal dominant inherited disorder?

Correct AnswerverifiedShow Answer

Polyspermy is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAlthough what Joe says is technically tr...View AnswerShow Answer

Which of the following phenotypic characteristics is an example of "codominance"?

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Correct Answer
verified
Although what Joe says is technically tr...
View Answer

Correct Answer
verified