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Histology > The Cell (PPT based) Part IV > Flashcards

The Cell (PPT based) Part IV Flashcards

1
Q

also known as the gap phase

A

G2 phase

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2
Q

follows the S phase and extends to mitosis

A

G2 phase

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3
Q

lasts 2-4 hours

A

G2 phase

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4
Q

cell prepares to divide

A

G2 phase

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5
Q

centrioles grow to maturity

A

G2 phase

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6
Q

energy required for the completion of mitosis is stored

A

G2 phase

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7
Q

RNA and proteins necessary for mitosis are synthesized

A

G2 phase

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8
Q

follows the G2 phase

A

Mitosis

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9
Q

completes the cell cycle

A

Mitosis

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10
Q

involves Karyokinesis and Cytokinesis

A

Mitosis

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11
Q

division of the nucleus

A

Karyokinesis

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12
Q

division of the cytoplasm resulting in the production of two identical daughter cell

A

Cytokinesis

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13
Q

last 1-3 hours

A

Mitosis

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14
Q

4 major stages of Mitosis:

A

prophase
metaphase
anaphase
telophase

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15
Q

chromosomes condensed and become rod-like

A

Prophase

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16
Q

centrioles are forming asters

A

Prophase

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17
Q

nucleus and nuclear envelope disappear

A

Prophase

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18
Q

condensed chromosomes are aligned at the equatorial plate of the mitotic spindle

A

Metaphase

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19
Q

chromatids separate at the centromere

A

Anaphase

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20
Q

daughter chromosomes move to opposite poles of the cell

A

Anaphase

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21
Q

elongation of the spindle

A

Anaphase

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22
Q

formation of a cleavage furrow

A

Anaphase

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23
Q

due to contraction of a band of actin filaments called the contractile ring

24
Q

deepening of the cleavage furrow which leaves the midbody (containing overlapping polar microtubules) b/w daughter cells

25
Q

facilitating the completion of cytokinesis and formation of 2 identical daughter cells

26
Q

reformation of the nuclear envelope

27
Q

reappearance of nucleoli

28
Q

completed when daughter cells enlarged and dense chromosomes disperse in interphase

29
Q

special form of cell division

30
Q

sex cells divide this type

31
Q

chromosome number is reduced from diploid (2n) to haploid (n)

32
Q

occurs in developing germ cells (spermatozoa and oocytes), fertilization results in diploid zygotes

33
Q

doubling of DNA content in S phase

34
Q

affected by 2 successive cell divisions that give rise to 4 haploid cells

35
Q

accompanied by recombination of maternal and paternal genes by crossing over and random assortment

36
Q

2 stages of meiosis:

A

A. Reductional division (meiosis I)
B. Equatorial division (meiosis II)

37
Q

Reductional division (meiosis I):

A
  1. Prophase I
    a) Leptotene
    d) Diplotene
    b) Zygotene
    e) Diakinesis
    c) Pachytene
  2. Metaphase I
  3. Anaphase I
  4. Telophase I
38
Q

5 stages of Prophase I:

A

a) Leptotene
b) Zygotene
c) Pachytene
d) Diplotene
e) Diakinesis

39
Q

begins soon after completion of meiosis I

A

Equatorial division (meiosis II)

40
Q

events similar to meiosis

A

Equatorial division (meiosis II)

41
Q

occurs following interphase during which 46 chromosomes are duplicated giving the cell a 4CDNA content (total DNA content of the cell)

A

Reductional division (meiosis I)

42
Q

5 stages of Prophase I:
chromatin condenses into visible chromosomes

43
Q

5 stages of Prophase I:
each contains 2 chromatids joined at the centromere

44
Q

5 stages of Prophase I:
homologous maternal and paternal chromosomes pair and make physical contact (synapsis) via the synaptonemal complex, forming a tetrad

45
Q

5 stages of Prophase I:
where chiasmata are formed

46
Q

5 stages of Prophase I:
crossing over occurs

47
Q

5 stages of Prophase I:
random exchange of geners b/w segments of homologous chromosomes

48
Q

5 stages of Prophase I:
increasing genetic diversity

49
Q

5 stages of Prophase I:
where chromosomes continue to condense

50
Q

5 stages of Prophase I:
where chiasmata can be observed

51
Q

5 stages of Prophase I:
indicating sites where crossing over has taken place

52
Q

5 stages of Prophase I:
nucleolus disappears

A

Diakinesis

53
Q

5 stages of Prophase I:
chromosomes are condensed maximally

A

Diakinesis

54
Q

5 stages of Prophase I:
nuclear envelope disappears

A

Diakinesis

55
Q

begins soon after completion of meiosis I, following a brief interphase

A

EQUATORIAL DIVISION (MEIOSIS II)

56
Q

separation of sister chromatids and distribution into 4 daughter cells each containing

A

EQUATORIAL DIVISION (MEIOSIS II)

Histology (37 decks)

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