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Zoology > Cell Division > Flashcards

Cell Division Flashcards

1
Q

Four stages of cell division

A
  1. G1
  2. S-phase
  3. G2
  4. Mitosis
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2
Q

Cells that undergo rapid cell division

A
  • epithelial cells
  • hematopoetic stem cells
  • spermatogonia
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3
Q

Cells that do not undergo cell division

A
  • mature nerve tissues
  • mature muscle tissues
  • mature red blood cells
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4
Q

Cells that divide when induced

A
  • liver cells

- lymphocytes

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5
Q

G1 checkpoint

A

cell size, growth factors, DNA damage, nutrients

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6
Q

G2 checkpoint

A

cell size, DNA damage, DNA replication

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7
Q

Mitosis checkpoint

A

chromosome attachment to spindle

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8
Q

DNA structure of prokaryotes

A
  • circular
  • helical
  • double stranded
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9
Q

Cell division of prokaryotes

A

Binary Fission

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10
Q

Homologous chromosomes

A

possess gene that code for the same characteristic at the corresponding loci

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11
Q

Mitosis stage where chromosomes condense

A

Prophase

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12
Q

Mitosis stage where chromatids line up at the center

A

Metaphase

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13
Q

Mitosis stage where sister chromatids separate

A

Anaphase

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14
Q

Mitosis stage where cells are close to being separated completely

A

Telophase

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15
Q

True or False: In Meiosis I, it reduces chromosome number

A

True

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16
Q

True or False: In Meiosis II, it separates sister chromatids

A

True

17
Q

In what stage of Meiosis does pairing of homologous chromosomes occur?

A

Prophase I

18
Q

The point of crossing over of corresponding DNA segments

A

Chiasmata

19
Q

Pairing and physical connection of replicated homologous chromosomes

A

Synapsis

20
Q

Exchange of corresponding segments of DNA

A

Crossing over

21
Q

Where does spermatogonia occur?

A

Testis

22
Q

Where does oogonia occur?

A

Ovary

23
Q

What stage of oogenesis does ovulation occur?

A

Secondary oocyte arrested in Metaphase II

24
Q

When does a secondary oocyte become activated?

A

Fertilized by spermatozoa

25
Q

Three origins of genetic variation among offspring

A
  1. Independent assortment of chromosomes
  2. Crossing over
  3. Random fertilization

Zoology (3 decks)

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