Question 1

Amniotic fluid

Accepted Answer

A)  stores nutrients for the fetus. 
B)  absorbs wastes the fetus excretes. 
C)  protects the embryo against jarring movements. 
D)  prevents the fetus from becoming thirsty. 
E)  is a fetal form of blood. 
A)  stores nutrients for the fetus. 
B)  absorbs wastes the fetus excretes. 
C)  protects the embryo against jarring movements. 
D)  prevents the fetus from becoming thirsty. 
E)  is a fetal form of blood.

Question 2

Tanisha and Tawanda are twins but do not look at all alike.They are the result of fertilization of

Accepted Answer

A)  one oocyte by one sperm cell. 
B)  one oocyte by two sperm cells. 
C)  two oocytes by one sperm cell. 
D)  two oocytes by two sperm cells. 
E)  one oogonium by one spermatogonium. 
A)  one oocyte by one sperm cell. 
B)  one oocyte by two sperm cells. 
C)  two oocytes by one sperm cell. 
D)  two oocytes by two sperm cells. 
E)  one oogonium by one spermatogonium.

Question 3

The female gonads are the

Accepted Answer

A)  ovaries. 
B)  oocytes. 
C)  uterus. 
D)  labia. 
E)  breasts. 
A)  ovaries. 
B)  oocytes. 
C)  uterus. 
D)  labia. 
E)  breasts.

Question 4

The zona pellucida is

Accepted Answer

A)  a protective layer around the secondary oocyte. 
B)  a protective layer around the sperm. 
C)  a bump on the head of a sperm that contains enzymes. 
D)  the biggest constriction of a chromosome. 
E)  a region of the testis. 
A)  a protective layer around the secondary oocyte. 
B)  a protective layer around the sperm. 
C)  a bump on the head of a sperm that contains enzymes. 
D)  the biggest constriction of a chromosome. 
E)  a region of the testis.

Question 5

During the first meiotic division

Accepted Answer

A)  sperm and oocytes form. 
B)  homologous chromosome pairs separate. 
C)  homologous chromosome pairs join. 
D)  the cell becomes diploid. 
E)  all of the chromosomes temporarily attach. 
A)  sperm and oocytes form. 
B)  homologous chromosome pairs separate. 
C)  homologous chromosome pairs join. 
D)  the cell becomes diploid. 
E)  all of the chromosomes temporarily attach.

Question 6

Teratogens are substances that

Accepted Answer

A)  stimulate embryonic growth. 
B)  cause birth defects. 
C)  protect against infection. 
D)  prevent accumulation of cholesterol. 
E)  cause genetic disease. 
A)  stimulate embryonic growth. 
B)  cause birth defects. 
C)  protect against infection. 
D)  prevent accumulation of cholesterol. 
E)  cause genetic disease.

Question 7

Meiosis is necessary because otherwise

Accepted Answer

A)  the fertilized ovum will have too much genetic material. 
B)  the fertilized ovum will have too little genetic material. 
C)  reproduction would have to be asexual. 
D)  too many mutations will occur. 
E)  growth and healing will become impaired. 
A)  the fertilized ovum will have too much genetic material. 
B)  the fertilized ovum will have too little genetic material. 
C)  reproduction would have to be asexual. 
D)  too many mutations will occur. 
E)  growth and healing will become impaired.

Question 8

Synapsis occurs during

Accepted Answer

A)  prophase I. 
B)  metaphase I. 
C)  anaphase I. 
D)  telophase I. 
E)  the second meiotic division. 
A)  prophase I. 
B)  metaphase I. 
C)  anaphase I. 
D)  telophase I. 
E)  the second meiotic division.

Question 9

During meiosis II in sperm development

Accepted Answer

A)  spermatogonia replicate DNA and divide mitotically to form primary spermatocytes. 
B)  primary spermatocytes divide meiotically to form diploid secondary spermatocytes. 
C)  secondary spermatocytes divide meiotically to form haploid spermatids. 
D)  spermatids divide meiotically to form haploid spermatozoa. 
E)  sperm and oocyte meet and merge. 
A)  spermatogonia replicate DNA and divide mitotically to form primary spermatocytes. 
B)  primary spermatocytes divide meiotically to form diploid secondary spermatocytes. 
C)  secondary spermatocytes divide meiotically to form haploid spermatids. 
D)  spermatids divide meiotically to form haploid spermatozoa. 
E)  sperm and oocyte meet and merge.

Question 10

The number of sperm cells in an ejaculate averages

Accepted Answer

A)  200 to 600. 
B)  2,000 to 6,000. 
C)  20,000 to 60,000. 
D)  200 to 600 million. 
E)  200 to 600 billion. 
A)  200 to 600. 
B)  2,000 to 6,000. 
C)  20,000 to 60,000. 
D)  200 to 600 million. 
E)  200 to 600 billion.

Question 11

The allantois

Accepted Answer

A)  destroys old blood cells. 
B)  gives rise to the yolk sac. 
C)  forms blood cells. 
D)  is part of the placenta. 
E)  is part of the maternal body. 
A)  destroys old blood cells. 
B)  gives rise to the yolk sac. 
C)  forms blood cells. 
D)  is part of the placenta. 
E)  is part of the maternal body.

Question 12

After the second meiotic division,the number of chromosomes in each daughter cell is _______ that of the original parental cell.

Accepted Answer

A)  half 
B)  double 
C)  the same as 
D)  quadruple 
E)  one fourth of 
A)  half 
B)  double 
C)  the same as 
D)  quadruple 
E)  one fourth of

Question 13

Current thinking about the cause of Hutchinson-Gilford syndrome,which is a severe segmental progeroid syndrome,is that

Accepted Answer

A)  the cellular clock ticks much too fast. 
B)  the part of the brain that controls aging is damaged. 
C)  abnormal lamin A protein stresses the nuclear membrane, disturbing DNA repair such that mutations accumulate that cause the diseases of aging. 
D)  a protein called progerin forms clumps in the brain in a way that removes DNA from the tips of telomeres, shortening chromosomes and lifespan. 
E)  starvation in the uterus sets the stage for diseases of the aged occurring in childhood. 
A)  the cellular clock ticks much too fast. 
B)  the part of the brain that controls aging is damaged. 
C)  abnormal lamin A protein stresses the nuclear membrane, disturbing DNA repair such that mutations accumulate that cause the diseases of aging. 
D)  a protein called progerin forms clumps in the brain in a way that removes DNA from the tips of telomeres, shortening chromosomes and lifespan. 
E)  starvation in the uterus sets the stage for diseases of the aged occurring in childhood.

Question 14

Body parts derived from mesoderm are the

Accepted Answer

A)  nervous system and sense organs. 
B)  muscle tissue, bone tissue, and internal reproductive organs. 
C)  epidermis, hair, nails, and glands of skin. 
D)  respiratory tract, urinary bladder, and urethra. 
E)  pancreas, kidneys, and lymphatic vessels. 
A)  nervous system and sense organs. 
B)  muscle tissue, bone tissue, and internal reproductive organs. 
C)  epidermis, hair, nails, and glands of skin. 
D)  respiratory tract, urinary bladder, and urethra. 
E)  pancreas, kidneys, and lymphatic vessels.

Question 15

Latika and Jeremiah are thrilled at the ultrasound scan that shows that their fetus appears to be a boy.It is the first time this has shown up on a scan.Latika is likely in her ___ week of pregnancy.

Accepted Answer

A)  third 
B)  sixth 
C)  twelfth 
D)  twentieth 
E)  thirtieth 
A)  third 
B)  sixth 
C)  twelfth 
D)  twentieth 
E)  thirtieth

Question 16

The number of sperm cells that form from a primary spermatocyte is

Accepted Answer

A)  2. 
B)  4. 
C)  16. 
D)  100. 
E)  8 million. 
A)  2. 
B)  4. 
C)  16. 
D)  100. 
E)  8 million.

Question 17

Fertilization usually occurs in the

Accepted Answer

A)  ovary. 
B)  uterine tube. 
C)  uterus. 
D)  cervix. 
E)  endometrium (uterine lining). 
A)  ovary. 
B)  uterine tube. 
C)  uterus. 
D)  cervix. 
E)  endometrium (uterine lining).

Question 18

Primary spermatocytes develop from the division of

Accepted Answer

A)  sperm cells. 
B)  male gametes. 
C)  secondary spermatocytes. 
D)  spermatogonia. 
E)  somatic cells 
A)  sperm cells. 
B)  male gametes. 
C)  secondary spermatocytes. 
D)  spermatogonia. 
E)  somatic cells

Question 19

The nuclei from the approaching sperm and egg are called

Accepted Answer

A)  prenuclei. 
B)  mononuclei. 
C)  pronuclei. 
D)  gametocytes. 
E)  gametes. 
A)  prenuclei. 
B)  mononuclei. 
C)  pronuclei. 
D)  gametocytes. 
E)  gametes.

Question 20

A normal oogonium is a(n)_______ cell.

Accepted Answer

A)  haploid 
B)  diploid 
C)  aneuploid 
D)  polyploid 
E)  triploid 
A)  haploid 
B)  diploid 
C)  aneuploid 
D)  polyploid 
E)  triploid

Exam 3: Meiosis and Development

Amniotic fluid

Tanisha and Tawanda are twins but do not look at all alike.They are the result of fertilization of

The female gonads are the

The zona pellucida is

During the first meiotic division

Teratogens are substances that

Meiosis is necessary because otherwise

Synapsis occurs during

During meiosis II in sperm development

The number of sperm cells in an ejaculate averages

The allantois

After the second meiotic division,the number of chromosomes in each daughter cell is _______ that of the original parental cell.

Current thinking about the cause of Hutchinson-Gilford syndrome,which is a severe segmental progeroid syndrome,is that

Body parts derived from mesoderm are the

Latika and Jeremiah are thrilled at the ultrasound scan that shows that their fetus appears to be a boy.It is the first time this has shown up on a scan.Latika is likely in her ___ week of pregnancy.

The number of sperm cells that form from a primary spermatocyte is

Fertilization usually occurs in the

Primary spermatocytes develop from the division of

The nuclei from the approaching sperm and egg are called

A normal oogonium is a(n)_______ cell.

Overview of Genetics

Cells

Single-Gene Inheritance

Beyond Mendels Law

Matters of Sex

Multifactorial Traits

Genetics of Behavior

DNA Structure and Replication

Gene Action: From Dna to Protein

Gene Expression and Epigenetics

Gene Mutation

Chromosomes

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry

Genetics of Immunity

Genetics of Cancer

Genetic Technologies: Amplifying, Modifying, and Monitoring DNA

Genetic Testing and Treatment

Reproductive Technologies

Genomics

Filters