Mitosis and Meiosis Review

1
Mitosis and Meiosis Review
2
True or False?

• Mitosis is considered to be a form of asexual
  reproduction

3

• True

4
True or False?

• During cytokinesis in plant cells, the cell is
  pinched in half by a belt of protein threads.

5

• False in plant cells a cell plate and cell wall
  forms between the two nuclei.

6
True or False?

• Meiosis produces four cells that have a different
  number of chromosomes than the original cell

7

• True

8
True or false?

• Cells spend most of their lifetime in interphase.

9

• True

10

• How do bacteria reproduce?

11

• Binary fission (asexual reproduction)

12

• The point at which two chromatids are attached to
  each other in a chromosome is called a
  ___________

13

• Centromere

14

• How many chromosomes are in the body cells of an
  organism that has a haploid number of 8?

15

• 16

16

• The failure of replicated chromosomes to separate
  is called ____________________.

17

• nondisjunction

18
A cell has a diploid number of 8.

• How many chromatids will it have in G2?
• 2
• 4
• 8
• 16
• 32
• None of these

19
A cell has a diploid number of 8.

• How many chromatids will it have in G2?
• 2
• 4
• 8
• 16
• 32
• None of these

20
A cell has a diploid number of 8.

• How many chromatids would a newly formed sperm
  cell have?
• 2
• 4
• 8
• 16
• 32
• None of these

21
A cell has a diploid number of 8.

• How many chromatids a newly formed sperm cell
  have?
• 2
• 4
• 8
• 16
• 32
• None of these

22
A cell has a diploid number of 8.

• How many homologous pairs of chromosomes?
• 2
• 4
• 8
• 16
• 32
• None of these

23
A cell has a diploid number of 8.

• How many homologous pairs of chromosomes?
• 2
• 4
• 8
• 16
• 32
• None of these

24
A cell has a diploid number of 8.

• How many chromosomes from the mother?
• 2
• 4
• 8
• 16
• 32
• None of these

25
A cell has a diploid number of 8.

• How many chromosomes from the mother?
• 2
• 4
• 8
• 16
• 32
• None of these

26

• A picture of a cells chromosomes is called a
  ________________________

27

• Karyotype

28
Which of these is diploid?

• a) egg cell
• b) sperm cell
• c) zygote
• d) none of the above

29

• c) a zygote is diploid

30
What has occurred in this mutation?
31

• inversion

32

• A spindle fiber is a specialized form of
• a. microtubule. c. cilium.
• b. flagellum. d. chromosome.

33

• A. microtubule

34
When does nondisjunction occur?

• (during what phases)

35
Anaphase I or Anaphase II
36
True or False?

• During telophase, a nuclear envelope surrounds
  each new set of chromosomes

37

• True

38

• A cell is in G2, preparing to enter mitosis.
• It has 12 pairs of chromosomes.
• How many total chromatids are present?

39
48

• 12 pairs 24 total chromosomes
• each chromosome has 2 chromatids, so 48 chromatids

40
True or False?

• Crossing-over is the exchange of reciprocal
  segments of DNA between non-homologous
  chromosomes.

41

• False between HOMOLOGOUS chromosomes

42
Diagrams A and B show cells from an organism with
a diploid chromosome number of 4.

• Which will be diploid at the completion of
  division?
• a) A b) B
• c) both A and B d) neither A nor B

43

• A it is going through mitosis

44

• What is synthesized during the S phase of the
  cell cycle?

45

• DNA, or an identical sister chromatid

46
When do centrioles move to the poles of a cell?

• A) prophase
• B) metaphase
• C) anaphase
• D) telophase

47

• A) prophase

48
What phase is being shown?
49
Anaphase
50
Cytokinesis is the division of ___
51
Cytoplasm
52
In which phase does the DNA condense into visible
chromosomes?
53
prophase
54
What phase is being shown?
55
Metaphase I of Meiosis
56
These noncoding ends of chromosomes are called
_______

• Shown
• in
• yellow
• ?

57
Telomeres
58

• Another name for somatic cells is __________
  cells.
• They are always haploid/diploid.
• (choose one)

59

• somatic, diploid

60

• The process by which a zygote is formed is called
  ______________

61
Fertilization
62
What is the name for the process that produces
egg cells?

• (more specific than meiosis)

63
Oogenesis