Question 1

The hollow cavity within the blastocyst is the

Accepted Answer

A)   gastrula.
B)   morula.
C)   blastocoele.
D)   yolk sac.
E)   amnion.

Question 2

Regarding X-linked traits, if a father with normal color vision has children with a heterozygous mother, what percentage of the daughters will have normal color vision?

Accepted Answer

A)   0%
B)   25%
C)   50%
D)   75%
E)   100%

Question 3

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)   relaxin

Question 4

If an X-carrying sperm fertilizes an egg, the resulting zygote will be

Accepted Answer

A)   either male or female.
B)   male only.
C)   female only.
D)   nonviable.
E)   both male and female.

Question 5

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)

Question 6

Which of the following is an example of positive feedback during labor?

Accepted Answer

A)   the movement of the fetus toward the cervical canal
B)   the pressure the unborn exerts on the cervix
C)   the distortion of the myometrium stimulates oxytocin release
D)   the dilation of the cervix followed by the rupture of the amnion
E)   the ejection of the placenta at the end of the placental stage

Question 7

Separation of the inner cell mass from the trophoblast forms the

Accepted Answer

A)   blastocoele.
B)   lacunae.
C)   amniotic cavity.
D)   chorion.
E)   allantois.

Question 8

An individual who is homozygous dominant for a trait would be represented as

Accepted Answer

A)   aA.
B)   aa.
C)   AA.
D)   Aa.
E)   a fusion of the different phenotypes of the given trait.

Question 9

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s) .

Accepted Answer

A)   first
B)   second
C)   third
D)   first and second
E)   second and third

Question 10

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)   lacuna

Question 11

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.

Question 12

Genes that appear on the X chromosome are said to be

Accepted Answer

A)   X-linked.
B)   autosomal recessive.
C)   heterozygous.
D)   homologous.
E)   lethal.

Question 13

Regarding lactation and the mammary glands, which statement is true?

Accepted Answer

A)   Colostrum contains more proteins than breast milk.
B)   An expectant mother's mammary glands begin producing colostrum by the end of the second month of pregnancy.
C)   As colostrum production increases, the mammary glands convert to milk production.
D)   Colostrum, unlike milk, contains large quantities of lysozymes.
E)   Colostrum has much more fat than breast milk.

Question 14

The study of the development of the human organism during the first two months after fertilization is called

Accepted Answer

A)   genetics.
B)   embryology.
C)   pediatrics.
D)   anthropology.
E)   gerontology.

Question 15

Sperm carry

Accepted Answer

A)   only one X sex chromosome, exclusively.
B)   only one Y sex chromosome, exclusively.
C)   no sex chromosomes.
D)   two Y sex chromosomes.
E)   one X or one Y sex chromosome.

Question 16

The purpose of the Human Genome Project (HGP)  is to

Accepted Answer

A)   identify alleles for research in the field of autosomal recessive diseases.
B)   describe the full set of genetic material in human chromosomes.
C)   discover new methods for fingerprinting and other forensic methods.
D)   create a "master race" by limiting the gene pool to carriers of desirable genes.
E)   study human development and to ultimately find a way to slow down senescence.

Question 17

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 cavity

Exam 20: Development and Inheritance

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

Which of the following is an example of positive feedback during labor?

Correct Answer
verified

Regarding lactation and the mammary glands, which statement is true?

Correct Answer
verified

If an X-carrying sperm fertilizes an egg, the resulting zygote will be

Correct Answer
verified

Separation of the inner cell mass from the trophoblast forms the

Correct Answer
verified

Sperm carry

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

Genes that appear on the X chromosome are said to be

Correct Answer
verified

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s) .

Correct Answer
verified

Regarding X-linked traits, if a father with normal color vision has children with a heterozygous mother, what percentage of the daughters will have normal color vision?

Correct Answer
verified

A relatively common inherited autosomal recessive disorder is

Correct Answer
verified

An individual who is homozygous dominant for a trait would be represented as

Correct Answer
verified

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

Correct Answer
verified

The hollow cavity within the blastocyst is the

Correct Answer
verified

The purpose of the Human Genome Project (HGP) is to

Correct Answer
verified

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

Correct Answer
verified

The study of the development of the human organism during the first two months after fertilization is called

Correct Answer
verified

Exam 20: Development and Inheritance

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

Which of the following is an example of positive feedback during labor?

Correct AnswerverifiedShow Answer

Regarding lactation and the mammary glands, which statement is true?

Correct AnswerverifiedShow Answer

If an X-carrying sperm fertilizes an egg, the resulting zygote will be

Correct AnswerverifiedShow Answer

Separation of the inner cell mass from the trophoblast forms the

Correct AnswerverifiedShow Answer

Sperm carry

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

Genes that appear on the X chromosome are said to be

Correct AnswerverifiedShow Answer

The period of gestation that is characterized by rapid fetal growth and adipose tissue deposition is the ________ trimester(s) .

Correct AnswerverifiedShow Answer

Regarding X-linked traits, if a father with normal color vision has children with a heterozygous mother, what percentage of the daughters will have normal color vision?

Correct AnswerverifiedShow Answer

A relatively common inherited autosomal recessive disorder is

Correct AnswerverifiedShow Answer

An individual who is homozygous dominant for a trait would be represented as

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The hollow cavity within the blastocyst is the

Correct AnswerverifiedShow Answer

The purpose of the Human Genome Project (HGP) is to

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The study of the development of the human organism during the first two months after fertilization is called

Correct AnswerverifiedShow Answer

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