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Biology gcse > SB2a - Mitosis > Flashcards

SB2a - Mitosis Flashcards

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1
Q

What is multicellular organism?

A

An organism made of many cells

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2
Q

Why are do cells divide?

A

As the processes of growth and repair require new cells

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3
Q

What does mitosis do?

A

Cell division that creates new identical diploid cells

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4
Q

What does diploid mean?

A

A cell with 46 chromosomes

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5
Q

What does haploid mean?

A

A cell that has 23 chromosomes

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6
Q

What are the products of mitosis?

A

Identical daughter cells

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7
Q

What is the stage just before mitosis?

A

Interphase where the cell makes extra sub cellular parts like mitochondria and DNA replication

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8
Q

What is stage 1 of mitosis?

A

Prophase where the nucleus starts to break down and spindle fibres appear

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9
Q

What is stage 2 of mitosis?

A

Metaphase where the chromosomes are lined up on the spindle fibres across the middle of the cell

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10
Q

What is stage 3 of mitosis?

A

Anaphase where spindle fibres are stretched and the chromosome copies are separated onto either side of the cell

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11
Q

What is stage 4 of mitosis?

A

Telophase where a membrane forms around each set if chromosomes to form nuclei

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12
Q

What is the stage just after mitosis?

A

Cytokinesis where a cell surface membrane forms to separate the two cells and then cell walls form in plants

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13
Q

What are all the stages of mitosis in order including those just before and after?

A 
Interphase
Prophase 
Metaphase 
Anaphase 
Telophase 
Cytokinesis
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14
Q

What is asexual reproduction?

A

Where organisms reproduce with just one parent

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15
Q

What are the asexual reproduction offspring?

A

Clones

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16
Q

What does asexual reproduction rely on?

A

Mitosis

17
Q

How do strawberry plants reproduce asexually?

A

Using stems that grow along the ground called runners

18
Q

What is a positive of asexual reproduction?

A

Faster than sexual reproduction and can minimise chances of the species going extinct

19
Q

Give some characteristics of sexual reproduction

A

It’s slower and there can be variation within the offspring

20
Q

Give a negative of asexual reproduction

A

There is no variation so a disease can wipe out a whole population

21
Q

What could happen if the mitosis becomes uncontrollable?

A

Cancer cells may form

Biology gcse (32 decks)

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