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General Biology 1 > Cell Cycle (Meiosis) > Flashcards

Cell Cycle (Meiosis) Flashcards

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1
Q

Also called reduction division

A

Meiosis

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2
Q

What type of cells undergo meiosis

A

Sex cells / gametes

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3
Q

Does meiosis produce diploid or haploid cells?

A

4 haploid cells

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4
Q

What are the stages of meiosis

A

Interphase

Meiosis I

Meiosis II

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5
Q

What are the stages of meiosis I

A

Prophase I

Metaphase I

Anaphase I

Telophase I

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6
Q

What happens under prophase I

A

Nuclear envelope breaks down

Chromosomes condense

Synapsis begins

Crossing over of chromosomes happens

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7
Q

What are the stages of prophase I

A

Leptonema

Zygonema

Pachynema

Diplonema

Diakinesis

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8
Q

What stage of prophase I does the condensing of chromosomes occur?

A

Leptonema

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9
Q

What stage of Prophase I do synapsis occur

A

Zygonema

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10
Q

What stage of Prophase I does generic recombination occur?

A

Pachynema

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11
Q

What stage of Prophase I does the synaptonemal complex dissolve and homologues start to separate alittle

A

Diplonema

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12
Q

What stage of Prophase I does the nuclear envelope dissolve

A

Diakinesis

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13
Q

Chromosomes with similar size, shape, length, and genetic content

A

Homologous chromosomes

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14
Q

The pairing of homologous chromosomes

A

Synapsis

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15
Q

What is the point of crossing over?

A

Chiasma / chiasmata

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16
Q

What happens during metaphase I?

A

The alignment of homologous chromosomes at the metaphase plate

17
Q

What happens in anaphase I

A

Homologous chromosomes split and travel to opposite poles of the cell

18
Q

Reappearance of the nuclear membrane around the new set of newly split homologous chromosomes

A

Telophase I

19
Q

What is the purpose of meiosis Ii

A

To divide sister chromatids and form 4 haploid cells

20
Q

Meiosis that resembles mitotic division

A

Meiosis II

21
Q

Stages of meiosis II

A

Prophase II

Metaphase II

Anaphase II

Telophase II

22
Q

What happens in Prophase II

A

Chromosomes condense

New spindle fibers are formed

23
Q

What happens in Metaphase II

A

Alignment of sister chromatids at the metaphase plate

24
Q

What happens in anaphase II

A

Separation of sister chromatids

25
Q

What happens in telophase II

A

Formation of a new nuclear envelope around each new set of chromosomes

26
Q

Purpose of meiosis i

A

Divide the number of chromosomes from diploid to haploid

27
Q

What happens in interphase before meiosis i occurs?

A

Organelles, proteins, and DNA systhesis

28
Q

How many chromosomes are present at the start of meiosis i

A

46, because of S phase in interphase of meiosos

29
Q

After meiosis i, how many chromosomes are in the 2 cells produced?

A

23 chromosomes; half of the chromosomal number

General Biology 1 (5 decks)

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