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Genetics > Meiosis > Flashcards

Meiosis Flashcards

1
Q

what is the longest stage of meiosis

A

Prophase 1

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2
Q

name the 5 substages of Prophase 1

A

Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis

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3
Q

in what meiosis Prophase 1 stage do the chromatids condense and become visible

A

Leptotene

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4
Q

in what Prophase 1 substage does the homologous search begin

A

leptoene

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5
Q

when does the location, size, and number of centromeres becomes specific

A

Leptotene

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6
Q

when does the pairing of homologous chromosomes occur

A

Zygotene

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7
Q

What is the S Complex

A

associated with the tight association of homologous chromosomes

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8
Q

tight association of homologous chromosomes is called what

A

bivalent

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9
Q

in what stage does the S Complex occur in

A

Zygotene

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10
Q

in what Prophase 1 substage are chromosomes referred to as bivalent

A

Zygotene

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11
Q

the # of bivalent = __ Number

A

Haploid

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12
Q

what is the term that is for the tight association between homologous chromosomes

A

tetrad

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13
Q

in what Prophase 1 substage does recombination primarily take place

A

Pachytene

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14
Q

in what Prophase 1 substage does the synapnal complex begin to break down

A

Diplotene

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15
Q

the Synapsal complex is when the chromosomes …

A

begin to move apart a bit

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16
Q

in what Prophase 1 substage does the nuclear membrane begin to break down

A

Diakinesis

17
Q

in what Prophase 1 substage does chromosome movement towards the metaphase plate occur

A

Diakinesis

18
Q

in what Prophase 1 substage does the Spindle apparatus begin to form

A

Diakinesis

19
Q

what meiotic phase does the alignment of chromosomes at the metaphase plate take place

A

Metaphase 1

20
Q

in what meiotic phase do the chromosomes begin to pull apart

A

Anaphase 1

21
Q

late anaphase 1 is when the chromosomes __ pull apart

A

further

22
Q

chromosomal pulling apart is referred to as ___ ___ because the tetrads rep 2 homologous chromosomes seperate apart

A

reductional division

23
Q

Mitosis is an __ division

A

equational

24
Q

Meiosis is a __ division

A

reductional

25
Q

In what meiotic stage do the tetrads align at the metaphase plate

A

Metaphase 1

26
Q

In what meiotic stage does independent assortment occur

A

Metaphase 1

27
Q

reductional division occurs in

A

anaphase 1

28
Q

In what meiotic stage do chromosomes go from 2n to 1n

A

anaphase 1

29
Q

anaphase 1 is __ division

A

reductional

30
Q

anaphase 2 is __ division

A

equational

31
Q

what produces genetic variation

A

recombination/ crossing over (chiasma)

32
Q

what happens when meiosis goes awry?

A

chromosomal mutation

Genetics (15 decks)

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