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BIOL1020 FINAL > Meiosis - Details! > Flashcards

Meiosis - Details! Flashcards

1
Q

In meiosis DNA replication happens in…

A

Interphase

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2
Q

Where do preparations happen in meiosis?

A

Interphase

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3
Q

In meiosis there are __ cell divisions.

A

2

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4
Q

Meiosis one creates:

A

2 Daughter Cells

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5
Q

In Meiosis II, 2 daughter cells make…

A

4 Daughter cells

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6
Q

Both Meiosis I & II have

A

Prophase
Metaphase
Anaphase
Telophase

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7
Q

Both Meiosis I & II are preceded by an..

A

Interphase & S Phase

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8
Q

Meiosis occurs only in…

A

Diploid, Tetraploid & Hexaploid Cells

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9
Q

In this phase of meiosis, chromatin becomes chromosomes. Homologous chromosomes pair up & synapse together.

A

Prophase I

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10
Q

In Prophase I, the homologous pairs form a

A

Tetrad - 4 Chromatids (2xSisters x2)

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11
Q

T/F Crossing over occurs only during Prophase 1.

A

TRUE!!!

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12
Q

When does the meiotic spindle form?

A

Prophase I

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13
Q

Tetrads will line up @ the equator here

A

Metaphase I

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14
Q

The spindles in metaphase 1 are different because they..

A

Attach only ONE per chromosome

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15
Q

The Double V appearance is typical in…

A

Anaphase I

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16
Q

In Anaphase I, the spindle apparatus ________ and centromeres __ ___ _______.

A

Shortens

Do not divide

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17
Q

In Telophase I, homologues are at opposite poles and each pole has…

A

1 Double Stranded Set of Chromosomes

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18
Q

In Telophase I, the homologues are __________ into __ _____ _______.

A

Seperated, 2 Haploid Cells

Will divide again into 4 daughter cells

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19
Q

Cytokinesis has to happen following Telophase I. T/F?

A

TRUE

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20
Q

Chromosomes will repack to chromatin in cytokinesis. T/F?

A

False - May reform, but not always

21
Q

Therefore the nucleus & nuclear envelope…

A

MAY reform

22
Q

This looks more like Mitosis than Meiosis!

A

Meiosis II

23
Q

T/F Meiosis II has a 2nd S phase.

A

FALSE

24
Q

T/F Meiosis II has a 2nd interphase.

A

FALSE - Already replicated

25
Q

There WILL BE Centrosome replication & spindle apparatus reform in…

A

Anaphase II

26
Q

Spindles attach __ per chromosome, from each side @ __________ in _______ __.

A

2, Centromere, Metaphase II

27
Q

Characteristic V shape appears in..

A

Anaphase II

28
Q

The other big part of Anaphase II?

A

Sister chromatids seperate!

29
Q

In Telophase II, the nuclear envelope will form around…

A

Pronucleus

30
Q

Cytokinesis occurs in Telophase II producing:

A

4 Daughter Cells

31
Q

T/F Sperm and Eggs are functional gametes after cytokinesis.

A

FALSE - Sperm need to lose weight, lose non-essential organelles and grow flagellum.

32
Q

Mitosis occurs in _______ cells while meiosis occurs in ___________.

A

Somatic

Sex Cells

33
Q

Ploidy of Mitosis & Meiosis

A

Mitosis - 2N

Meiosis - 1N

34
Q

T/F Sex cells can also divide by mitosis, but only cells that can divide by meiosis.

A

TRUE

35
Q

In Mitosis 1 cell makes:

In Meiosis 1 cell makes:

A

Mitosis: One–>2 Identical Daughters
Meiosis: One–>2–>4 different cells

36
Q

DNA replication happens in:

A

S phase/Interphase of Mitosis & Meiosis I

Not in Meiosis II

37
Q

Chromatin condensis in

A

Mit: Prophase
Meiosis I: Prophase I
Meiosis II: Prophase II

38
Q

Nuclear envelope breaks down in

A

Mit: Prometaphase
Meiosis I: Prophase I
Meiosis II: Prophase II

39
Q

Centrosomes divide in:

A

Interphase (all 3)

40
Q

Spindle apparatus forms:

A

Prophase
Prophase I
Prophase II

41
Q

Tetrads form

A

Prophase I

42
Q

Crossing over occurs

A

Prophase I

43
Q

Chromosomes align at the equator:

A

Metaphase
N/A
Metaphase II

44
Q

Homologues align at the equator:

A

Metaphase I

45
Q

Microtubules attach to the centromere:

A 
Metaphase (2 per)
Metaphase I (1 per)
Metphase II (2 per)
46
Q

Centrosomes seperate:

A

Anaphase
N/A
Anaphase II

47
Q

Homologues Seperate

A

Anaphase I

48
Q

Cytokineseis

A

Telophase
Telophase I
Telophase II

49
Q

Ploidy Reduced

A

Meiosis I - After Telophase I

BIOL1020 FINAL (18 decks)

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