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Oli Bio > Mitosis > Flashcards

Mitosis Flashcards

1
Q

What are the mitotic stages where the chromatin condenses?

A

Prophase and metaphase

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2
Q

What are the mitotic stages with spindle fibres are present?

A

All

Prophase, prometaphase, metaphase, anaphase and telophase

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3
Q

What are the mitotic stages when a nucleus may be seen?

A

Prophase and telophase

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4
Q

What are the mitotic stages when a nuclear membrane may be visible?

A

Prophase, prometaphase and telophase

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5
Q

What are the mitotic stages when kinetochores are linked to spindle fibres?

A

Prometaphase, metaphase, anaphase and telophase

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6
Q

When are double stranded chromosomes present?

A

Prophase, prometaphase and metaphase

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7
Q

When is the ploidy level 2n?

A

prophase, prometaphase, metaphase and telophase

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8
Q

What is the difference between mitosis and cytokinesis?

A

Mitosis is the division of chromosomes and nucleus while cytokinesis is the division of he cytoplasm and cell membrane

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9
Q

Can mitosis occur in prokaryotes?

A

No

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10
Q

What are the stages of the cell cycle?

A

Interphase, mitosis and cytokinesis

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11
Q

Briefly describe the stages in interphase.

A

G1: first growth S: DNA is replicated G2: cell finishes its growth

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12
Q

What are kinetochores?

A

They are proteins that attach the spindle fibres which are composed of microtubules to the centromere

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13
Q

What are the mitosis stages in order?

A

Prophase, prometaphase, metaphase, anaphase, telophase

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14
Q

Describe the prophase.

A

Chromatids coil tightly together
nucleolus disappears
Microtubules (spindle fibers) appear from the centromere

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15
Q

Describe the prometaphase.

A

Chromatid continues to condense
microtubules attach to kinetochores
nuclear membranes are broken down

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16
Q

Describe the metaphase.

A

Sister chromatids align so both chromatids face opposite poles.
Spindle fibres are attached by cohesin proteins

17
Q

Describe the anaphase.

A

Cohesin proteins degrade
Sister chromatids are separated
Spindle fibres are present
single started chromosomes are created (not ds like before)

18
Q

Describe the telophase.

A

Chromosomes start to decondense
nucleolus reappears
spindle fibres are still present
single started chromosomes are present

19
Q

Describe the cytokinesis.

A

This is when the cellular membrane and cytoplasm splits and you now have two independent cells with their own organelles

20
Q

What is the G0 phase

A

Cells that are not preparing to divide are located in this phase. Usually due to weather conditions

21
Q

Describe cytokinesis in animals.

A

begins in late anaphase
ring os actin filaments from beneath plasma membrane
cell is pinched in 2

22
Q

Describe cytokinesis in plants.

A

A cell plate is formed by fusion of vesicles from golgi complex

Oli Bio (7 decks)

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