Question 1

Polar bodies

Accepted Answer

A)   are dumping places for excess genetic material.
B)   have no known biological function.
C)   are produced by meiosis.
D)   will serve as the gametes if something happens to the egg.
E)   all of these except "will serve as the gametes if something happens to the egg" E

Question 2

The spindle apparatus is made of

Accepted Answer

A)   Golgi bodies.
B)   microtubules.
C)   endoplasmic reticulum.
D)   nucleoprotein.
E)   chromatids. B

Question 3

Which does NOT produce variation?

Accepted Answer

A)   crossing over
B)   random alignment of chromosomes during meiosis
C)   mitosis
D)   genetic recombination of alleles
E)   sexual reproduction C

Question 4

In which of the stages below does the chromosome consist of two chromatids?

Accepted Answer

A)   prophase and anaphase
B)   metaphase, prophase, and anaphase
C)   metaphase and prophase
D)   metaphase, telophase, and prophase
E)   metaphase, telophase, prophase, and anaphase

Question 5

Genetic variation associated with meiosis is manifested as

Accepted Answer

A)   new combinations of alleles due to crossing over.
B)   random movement of homologous pairs of chromosomes moving to spindle poles.
C)   random chance playing a role when a sperm fertilizes an egg.
D)   diploid cells expressing various traits.
E)   a, b, and c.

Question 6

The chromosome number in human body cells is

Accepted Answer

A)   23.
B)   39.
C)   46.
D)   69.
E)   variable depending on the cell.

Question 7

Which of these statements concerning the centromere is NOT true?

Accepted Answer

A)   It appears to join duplicated DNAs.
B)   It anchors proteins to DNA.
C)   It varies from one type of chromosome to the next.
D)   It is the attachment site for microtubules.
E)   It is a "pinched in" region.

Question 8

Gametogenesis is

Accepted Answer

A)   always the result of the process of meiosis.
B)   the pairing of homologous chromosomes.
C)   the formation of sex cells.
D)   the fusion of gametes.
E)   a process that occurs only in asexually reproducing forms.

Question 9

The nuclear membrane reforms during

Accepted Answer

A)   anaphase.
B)   metaphase.
C)   interphase.
D)   prophase.
E)   telophase.

Question 10

The stages of meiosis I are virtually the same as the stages of mitosis. The one major difference is

Accepted Answer

A)   the homologous chromosomes line up opposite each other during metaphase.
B)   there is no anaphase in meiosis I.
C)   there is no prophase in meiosis I.
D)   the homologous chromosomes line up next to each other during metaphase.
E)   the homologous chromosomes line up at opposite ends of the spindle equator.

Question 11

Classification . Referring to mammalian reproduction, answer the questions using the five items listed below.
I. sperm
II. mature ova
III. primary oocytes
IV. primary spermatocytes
V. zygotes
Which item or items are the same as a fertilized egg?

Accepted Answer

A)   II only
B)   III only
C)   V only
D)   II and III
E)   III and V

Question 12

The number of chromatids present in a duplicated chromosome is

Accepted Answer

A)   1.
B)   undetermined.
C)   half that of an unduplicated chromosome.
D)   2.
E)   4.

Question 13

Chromatids that are attached at the centromere are called what kind of chromatids?

Accepted Answer

A)   mother
B)   daughter
C)   sister
D)   programmed
E)   either mother or daughter

Question 14

Meiosis is considered a

Accepted Answer

A)   duplicational division.
B)   multiplication division.
C)   parallel division.
D)   reduction division.
E)   autosome division.

Question 15

Selecting the Exception Four of the five answers listed below are terms describing haploid cells. Select the exception.

Accepted Answer

A)   ovum
B)   primary spermatocyte
C)   spermatid
D)   polar body
E)   secondary spermatocyte

Question 16

Classification . Referring to mammalian reproduction, answer the questions using the five items listed below.
I. sperm
II. mature ova
III. primary oocytes
IV. primary spermatocytes
V. zygotes
Which is a normal sequence of development?

Accepted Answer

A)   I >>> II >>> III
B)   I >>> IV >>> V
C)   II >>> III >>> V
D)   III >>> II and IV >>> I
E)   I >>> IV and II >>> V

Question 17

Which of the following will NOT develop into a gamete?

Accepted Answer

A)   spermatogonium
B)   polar bodies
C)   oocyte
D)   spermatid
E)   secondary spermatocyte

Question 18

Chromatids are

Accepted Answer

A)   attached at the centriole.
B)   a pair of chromosomes, one from the mother and one from the father.
C)   attached at their centromeres.
D)   identical until crossing over occurs.
E)   both attached at their centromeres and identical until crossing over occurs.

Question 19

The spindle apparatus becomes visible during

Accepted Answer