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CELL MOL > Module 2 Meiosis > Flashcards

Module 2 Meiosis Flashcards

1
Q

Meiosis + Fertilization

A

Sexual Reproduction

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2
Q

adjoins each strand to the other non-sister chromatid

A

synaptonemal complex

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3
Q

_______ is process of pairing and binding of chromosome to its corresponding homologous chromosome forming a ________ (four chromatids)

A

synapsis, tetrad

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4
Q

process where each homologous chromosome exchange segments of alleles and is random (results in genetic variety in offsprings)

A

crossing over (recombination)

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5
Q

meiosis only produces ________: genetically different haploid cells

A

gametes (sperm and egg)

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6
Q

produces two haploid cells each containing one chromosome from the homologous pairs

A

Meiosis I

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7
Q

sister chromatids separate in both cells becoming individual chromosomes, cytokinesis of these cells produces four haploid gametes

A

Meiosis II

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8
Q

Stages of Prophase I (5)

A
  • Leptotene
  • Zygotene
  • Pachytene
  • Diplotene
  • Diakinesis
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9
Q

What stage of prophase meiosis I?

  • replicated chromosome condense
  • nuclear membrane still visible
A

Leptotene

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10
Q

What stage of prophase meiosis I?

  • bivalent/tetrad forming
  • synaptonemal complex forming
  • beginning of synapsis
A

Zygotene

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11
Q

What stage of prophase meiosis I?

  • a bivalent/tetrad has formed and crossing over has occurred
A

Pachytene

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12
Q

What stage of prophase meiosis I?

  • chiasma is present
  • synaptonemal complex dissociates
A

Diplotene

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13
Q

is a structure that forms between a pair of homologous chromosomes by crossover recombination and physically links the homologous chromosomes during meiosis

A

Chiasma

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14
Q

What stage of prophase meiosis I?

  • nuclear membrane fragmenting
A

Diakinesis

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15
Q
  • chromosome condenses
  • synapsis happens forming tetrad
  • crossing over / recombination
  • nuclear membrane disappears
  • centrioles move to opposite poles
  • spindle fiber grows
A

Prophase I

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16
Q
  • homologous chromosomes line up at the equator and attach to spindle fiber at opposite poles
A

Metaphase I

17
Q
  • spindle fibers separate the homologous chromosome in each tetrad and pull them to opposite poles of the cell
A

Anaphase I

18
Q
  • one chromosome from each homologous pair at each separate poles but still consists of sister chromatids
  • sister chromatids are no longer identical
  • spindle fibers disappear
  • nuclear membrane reforms
A

Telophase I

19
Q
  • no DNA replication
  • nuclear membrane disappears
  • centrioles move to opposite poles
  • spindle fiber grows
A

Prophase II

20
Q
  • chromosome in each line up at the equator and attach to spindle fibers from both poles
A

Metaphase II

21
Q
  • the sister chromatids of each chromosome separate and move to opposite poles
  • one the sister chromatids separate they’re called chromosomes
A

Anaphase II

CELL MOL (9 decks)

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