meiosis Flashcards

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1
Q

what kind of cells does meiosis produce

A

haploid cells

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2
Q

what happens in prophase 1

A
  • chromatin condenses into chromosomes, the spindle apparatus forms and the nucleoli and nuclear membrane disappear
  • homologous chromosomes come together and intertwine in a process called synapsis
  • crossing over occurs
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3
Q

what happens in metaphase 1

A

-homologous pairs align at the equatorial plane and each pair attaches to a separate spindle fiber at the kinetochore

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4
Q

what happens in anaphase 1

A

-homologous pairs separate and are pulled to opposite poles of the cell (disjuction)

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5
Q

what happens during disjunction

A

the paternal chromosome separates from its homologue of maternal origin and either chromosome can end up in a daughter cell

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6
Q

when does nondisjunction occur

A

when cells don’t separate appropriately during meiosis

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7
Q

what is the result of nondisjunction

A

daughter cells have an incorrect number of chromosomes

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8
Q

what happens in telophase 1

A

nuclear membrane forms around each nucleus

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9
Q

what happens in the second meiotic division

A

chromosomes aligns at the equator, separate and move to opposite poles and are surrounded by a re-formed nuclear membrane

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10
Q

is meiosis 2 preceded by chromosomal replication

A

no

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