Question 1

Which germ layer is the brain and spinal cord derived from?

Accepted Answer

A)   ectoderm
B)   mesoderm
C)   endodermD) A) and C)
E) None of the above

Question 2

Which of the following characterizes the developmental age of an eight month old infant?

Accepted Answer

A)   sits without support
B)   rolls from its back to its side
C)   smiles in response to people's faces
D)   pulls itself up to a standing position
E)   None of these choices is correctF) A) and B)
G) B) and C)

Question 3

The male and female reproductive systems begin as an indifferent stage. If testosterone is present, which of the following occurs?

Accepted Answer

A)   The paramesonephric duct forms the vagina.
B)   The mesonephric ducts form the ductus deferens.
C)   The mesonephric ducts atrophy.
D)   The paramesonephric ducts enlarge to form the scrotum.
E)   The paramesonephric duct atrophies.F) B) and C)
G) A) and E)

Question 4

Where does implantation normally occur?

Accepted Answer

A)   in the fundus area of the uterus
B)   in the isthmus area of the uterine tube
C)   in the cervix area of the uterus
D)   in the infundibulum area of the uterine tubeE) A) and D)
F) A) and C)

Question 5

An organism's genetic makeup is its ____ while its physical appearance is its ____.

Accepted Answer

A)   chromotype; phenotype
B)   genotype; phenotype
C)   phenotype; genotype
D)   genotype; chromotype
E)   aminotype; prototypeF) A) and E)
G) B) and E)

Question 6

The lungs develop from

Accepted Answer

A)   somitomeres.
B)   neural crest cells.
C)   an evagination from the foregut.
D)   an evagination from the floor of the diencephalon.
E)   an invagination from the hindgut.F) C) and D)
G) A) and D)

Question 7

If an albino (aa)  mates with a person homozygous for normal pigment (AA) ,

Accepted Answer

A)   half of the offspring are normal.
B)   half of the offspring are albinos.
C)   all offspring are normal.
D)   all offspring are albinos.
E)   None of these choices is correct.F) D) and E)
G) A) and B)

Question 8

An infant who has just started cooing and gurgling in response to smiles and attention from its parents is about _____ months old.

Accepted Answer

A)   two
B)   four
C)   six
D)   eight
E)   tenF) B) and C)
G) B) and E)

Question 9

The central cavity of the neural tube becomes the

Accepted Answer

A)   cerebrum.
B)   mid-brain.
C)   cranial cavity.
D)   ventricles of the brain.
E)   epidural space.F) A) and B)
G) B) and E)

Question 10

Atoms or molecules with unpaired electrons that can react with normal cells and cause damage are called ______.

Accepted Answer

A)   free radicals
B)   teratogens
C)   mutagens
D)   antioxidants
E)   vitaminsF) C) and D)
G) A) and B)

Question 11

Down Syndrome is an example of an aneuploidy called

Accepted Answer

A)   monosomy 21.
B)   trisomy 21.
C)   monosomy 23.
D)   trisomy 17.
E)   disomy 21.F) A) and D)
G) A) and E)

Question 12

The testes leave the abdominal cavity and reach the scrotum by passing through the

Accepted Answer

A)   urogenital opening.
B)   inguinal canal.
C)   cloaca.
D)   urethra.
E)   Wolffian ducts.F) All of the above
G) A) and B)

Question 13

Onset of labor may result from

Accepted Answer

A)   increased estrogen secretion by the placenta.
B)   increased glucocorticoid secretion by the mother.
C)   increased secretion of oxytocin by the fetus.
D)   increased progesterone secretion by the placenta.
E)   decreased prostaglandins.F) B) and D)
G) B) and C)

Question 14

A different form of an allele at a particular locus that can have no effect to major effects on the phenotype is a(n)

Accepted Answer

A)   allelic variant.
B)   mutated allele.
C)   polymorphism.
D)   All of the choices are correct.E) B) and C)
F) All of the above

Question 15

The birth process is called

Accepted Answer

A)   micturition.
B)   gastrulation.
C)   organogenesis.
D)   parturition.
E)   expulsion.F) A) and B)
G) A) and C)

Question 16

Which of the following fetal shunts bypasses the fetal lungs?

Accepted Answer

A)   ductus arteriosus
B)   ductus venosus
C)   umbilical arteries
D)   umbilical vein
E)   ductus byosusF) A) and B)
G) A) and C)

Question 17

Chromosome pairs are called

Accepted Answer

A)   karyotypes.
B)   genomes.
C)   homologous pairs.
D)   loci.
E)   haploid.F) C) and E)
G) A) and D)

Question 18

The thickened area of the blastocyst from which the embryo develops is called the _______________.

Accepted Answer

A)   inner cell mass
B)   trophoblast
C)   blastocele
D)   morula
E)   zygoteF) B) and C)
G) All of the above

Question 19

The first functional kidney is the

Accepted Answer

A)   mesonephros.
B)   pronephros.
C)   allantois.
D)   bulbos cordis.
E)   urorectal septum.F) A) and E)
G) A) and D)

Question 20

Damage to the mesoderm during embryological development would affect the formation of the

Accepted Answer

A)   thyroid.
B)   brain.
C)   heart.
D)   teeth.
E)   urinary bladder.F) All of the above
G) A) and B)

Exam 29: Development, Growth, Aging, and Genetics

An infant who has just started cooing and gurgling in response to smiles and attention from its parents is about _____ months old.

Correct AnswerverifiedShow Answer

Which germ layer is the brain and spinal cord derived from?

Correct AnswerverifiedShow Answer

Which of the following fetal shunts bypasses the fetal lungs?

Correct AnswerverifiedShow Answer

If an albino (aa) mates with a person homozygous for normal pigment (AA) ,

Correct AnswerverifiedShow Answer

The birth process is called

Correct AnswerverifiedShow Answer

The central cavity of the neural tube becomes the

Correct AnswerverifiedShow Answer

Which of the following characterizes the developmental age of an eight month old infant?

Correct AnswerverifiedShow Answer

An organism's genetic makeup is its ____ while its physical appearance is its ____.

Correct AnswerverifiedShow Answer

The male and female reproductive systems begin as an indifferent stage. If testosterone is present, which of the following occurs?

Correct AnswerverifiedShow Answer

Where does implantation normally occur?

Correct AnswerverifiedShow Answer

Damage to the mesoderm during embryological development would affect the formation of the

Correct AnswerverifiedShow Answer

Down Syndrome is an example of an aneuploidy called

Correct AnswerverifiedShow Answer

Onset of labor may result from

Correct AnswerverifiedShow Answer

The testes leave the abdominal cavity and reach the scrotum by passing through the

Correct AnswerverifiedShow Answer

The lungs develop from

Correct AnswerverifiedShow Answer

The first functional kidney is the

Correct AnswerverifiedShow Answer

Atoms or molecules with unpaired electrons that can react with normal cells and cause damage are called ______.

Correct AnswerverifiedShow Answer

A different form of an allele at a particular locus that can have no effect to major effects on the phenotype is a(n)

Correct AnswerverifiedShow Answer

The thickened area of the blastocyst from which the embryo develops is called the _______________.

Correct AnswerverifiedShow Answer

Chromosome pairs are called

Correct AnswerverifiedShow Answer

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An organism's genetic makeup is its while its physical appearance is its .

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