. Flashcards

(15 cards)

1
Q

What is the difference between a chromosome and a chromatid?

A

A chromatid is 1 pair of replicated chromosomes

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2
Q

What happens during interphase?

A

Cell grows twice and DNA + organelles replicate

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3
Q

What occurs during prophase 1?

A

Homologous chromosomes intertwine to form a tetrad through synapsis

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4
Q

How many sister chromatids does each chromosome have during prophase 1?

A

Each chromosome has 2 sister chromatids

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5
Q

What happens during metaphase 1?

A

Tetrads migrate to the center of the cell and align centromeres in the middle

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6
Q

What occurs during anaphase 1?

A

Homologous chromosomes move to opposite poles as spindle fibers shorten

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7
Q

What is significant about the chromosomes in each daughter cell after anaphase 1?

A

Each daughter cell will have 1 of 2 chromosomes from each homologous pair and is genetically unique

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8
Q

What happens during telophase 1?

A

Nuclear membranes reform, spindle fibers dissolve, and the cell divides via cytokinesis

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9
Q

What is the role of centrioles during prophase 2?

A

Centrioles move to opposite sides and spindle fibers form

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10
Q

What occurs during metaphase 2?

A

Chromosomes move to the center of the cell and align

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11
Q

What happens during anaphase 2?

A

Sister chromatids separate and move to opposite poles

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12
Q

What is the outcome of each cell after anaphase 2?

A

Each cell has a single sister chromatid that is not identical due to genetic exchange

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13
Q

What occurs during telophase 2?

A

Nuclear membrane reforms around chromatids, DNA relaxes into chromatin, and cytokinesis occurs again, resulting in 4 haploids

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14
Q

Fill in the blank: During metaphase 1, tetrads align at the _______.

A

equatorial plate

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15
Q

True or False: Each daughter cell after telophase 2 is diploid.

A

False

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