Question 1

The hormone(s)  responsible for preparing the breasts for lactation during pregnancy is/are ________.

Accepted Answer

A)   estrogen
B)   progesterone
C)   oxytocin
D)   prolactin
E)   Both "estrogen" and "progesterone" are correct.F) C) and D)
G) A) and D)

Question 2

Which of the following findings of Mendel's work are currently accepted as a valid explanation of genetic inheritance?

Accepted Answer

A)   Genes exist in pairs in an individual.
B)   Gene pairs separate during gamete formation.
C)   Gene pair segregation is relatively random during gamete formation.
D)   All of the choices are correct.E) C) and D)
F) B) and C)

Question 3

Which of the following statements concerning development of the integumentary system is true?

Accepted Answer

A)   The epidermis is derived from mesoderm.
B)   The melanocytes are derived from ectoderm.
C)   Nails, hair, and glands develop from the dermis.
D)   Sensory receptors in the skin are derived from the epidermis.
E)   Collagen fibers do not appear until after birth.F) C) and D)
G) A) and D)

Question 4

What term describes the inheritance of a trait which in the heterozygote has an intermediate expression between either allele?

Accepted Answer

A)   Incomplete penetrance
B)   Incomplete dominance
C)   Complete dominance
D)   CodominanceE) A) and C)
F) B) and C)

Question 5

The cytotrophoblast

Accepted Answer

A)   forms the chorionic villi.
B)   replaces the syncytiotrophoblast.
C)   remains throughout development.
D)   forms branches that protrude into the amniotic cavity.
E)   is not an embryonic part of the placenta.F) A) and B)
G) None of the above

Question 6

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) A) and E)
G) B) and C)

Question 7

Cryptorchidism

Accepted Answer

A)   is the failure of the testes to descend into the scrotal sac.
B)   may be due to excessive amounts of testosterone in the fetus.
C)   has no effect on fertility.
D)   results in feminization of the male fetus.
E)   is the lack of testes.F) B) and E)
G) C) and E)

Question 8

Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?

Accepted Answer

A)   Pancreas
B)   Thyroid gland
C)   Adrenal medulla
D)   Adenohypophysis
E)   Parathyroid glandsF) B) and E)
G) C) and D)

Question 9

Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?

Accepted Answer

A)   Ductus arteriosus
B)   Umbilical vein
C)   Umbilical artery
D)   Ductus venosus
E)   Foramen ovaleF) B) and D)
G) A) and E)

Question 10

The closed foramen ovale becomes the ________ after birth.

Accepted Answer

A)   fossa ovalis
B)   ligamentum ovale
C)   ligamentum venosum
D)   ligamentum arteriosum
E)   valvesF) None of the above
G) C) and D)

Question 11

A ________ is a display of the chromosomes of a somatic cell during metaphase of mitosis.

Accepted Answer

A)   karyotype
B)   genome
C)   gamete
D)   locusE) B) and C)
F) All of the above

Question 12

Which of the following genotypes will result in a male?

Accepted Answer

A)   XO
B)   XY
C)   XX
D)   XXX
E)   YYF) B) and C)
G) B) and E)

Question 13

Decreased renal filtration that occurs with aging can be the result of

Accepted Answer

A)   increased respiratory effort.
B)   decreased cardiac output.
C)   increased fluid volume.
D)   decreased ADH secretion.
E)   decreased peripheral resistance.F) B) and C)
G) B) and D)

Question 14

Which of the following vitamins are thought to play a role in decreasing the physiological changes in aging?

Accepted Answer

A)   Vitamins A and B12
B)   Vitamins A and B6
C)   Vitamins E and C
D)   Vitamins A and D
E)   Vitamins A and KF) All of the above
G) A) and E)

Question 15

The inner cell mass of the blastocyst

Accepted Answer

A)   consists of yolk-filled storage cells.
B)   contains cells that will form the embryo.
C)   represents the future placenta.
D)   will form the zona pellucida.
E)   contains cells that are discarded.F) A) and E)
G) A) and D)

Question 16

The genotype WW is best described as ________.

Accepted Answer

A)   homozygous recessive
B)   homozygous dominant
C)   heterozygous dominant
D)   heterozygous recessive
E)   homorecessiveF) A) and C)
G) A) and D)

Question 17

The birth process is called ________.

Accepted Answer

A)   micturition
B)   gastrulation
C)   organogenesis
D)   parturition
E)   expulsionF) A) and E)
G) A) and C)

Question 18

The most likely outcome of nondisjunction is the production of a gamete receiving ________.

Accepted Answer

A)   no chromosomes
B)   46 chromosomes
C)   44 chromosomes
D)   23 chromosomes
E)   22 chromosomesF) C) and D)
G) A) and E)

Question 19

Which of the following is an example of incomplete dominance?

Accepted Answer

A)   Minor thalassemia
B)   Major thalassemia
C)   Beta thalassemia
D)   Polymorphism
E)   Type AB blood typeF) B) and E)
G) A) and D)

Question 20

A person's height, intelligence, eye color, and skin color are examples of ________.

Accepted Answer

A)   incomplete dominance
B)   complete dominance
C)   complete recessiveness
D)   codominance
E)   polygenic traitsF) D) and E)
G) A) and D)

Exam 29: Development, Growth, Aging, and Genetics

The birth process is called ________.

Correct AnswerverifiedShow Answer

A person's height, intelligence, eye color, and skin color are examples of ________.

Correct AnswerverifiedShow Answer

The most likely outcome of nondisjunction is the production of a gamete receiving ________.

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

The genotype WW is best described as ________.

Correct AnswerverifiedShow Answer

Which of the following findings of Mendel's work are currently accepted as a valid explanation of genetic inheritance?

Correct AnswerverifiedShow Answer

The inner cell mass of the blastocyst

Correct AnswerverifiedShow Answer

A ________ is a display of the chromosomes of a somatic cell during metaphase of mitosis.

Correct AnswerverifiedShow Answer

Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?

Correct AnswerverifiedShow Answer

What term describes the inheritance of a trait which in the heterozygote has an intermediate expression between either allele?

Correct AnswerverifiedShow Answer

Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?

Correct AnswerverifiedShow Answer

The hormone(s) responsible for preparing the breasts for lactation during pregnancy is/are ________.

Correct AnswerverifiedShow Answer

Which of the following genotypes will result in a male?

Correct AnswerverifiedShow Answer

The closed foramen ovale becomes the ________ after birth.

Correct AnswerverifiedShow Answer

Which of the following is an example of incomplete dominance?

Correct AnswerverifiedShow Answer

Decreased renal filtration that occurs with aging can be the result of

Correct AnswerverifiedShow Answer

Which of the following vitamins are thought to play a role in decreasing the physiological changes in aging?

Correct AnswerverifiedShow Answer

Cryptorchidism

Correct AnswerverifiedShow Answer

The cytotrophoblast

Correct AnswerverifiedShow Answer

Which of the following statements concerning development of the integumentary system is true?

Correct AnswerverifiedShow Answer

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