Mitosis Flashcards

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1
Q

Why do organisms do mitosis?

A

1 - Asexual reproduction
2- Growth
3- Tissue repair

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2
Q

Describe Prophase

A

-Chromosomes condense and first become visible
- Centrioles move to poles
- Spindle fibres develop
-Nuclear envelope breaks down and nucleolus disappears

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3
Q

Describe Metaphase

A

-Chromosomes seen to be made up of 2 chromatids
- Chromatids joined by the centromere
- Chromosomes pulled by spindle apparatus and begin to arrange themselves across equator of cell

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4
Q

Describe Anaphase

A

-Centromeres divide in 2 and spindle fibres pull the individual chromatids apart
- Chromatids move to opposite poles
- Energy provided by Mitochondria

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5
Q

Describe Telophase

A
  • Chromosomes reach poles
  • Become indistinct
  • Nuclear envelope reforms, Nucleolus reforms
  • Spindle disintegrates
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6
Q

What happens at Cytokensis?

A

Cell wall divides

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7
Q

Why do we use Hydrochloric Acid in the Mitosis practical

A

Acid softens and loosens root tissues, so cells can be squashed

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8
Q

Why do we stain the cells?

A

To make the chromosomes visible

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9
Q

Why do we squash cells?

A

To make it one cell thick so light can pass through when viewing from a microscope

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10
Q

Why do we use a mounted needle?

A

To lower the cover slip and prevent air bubbles under the cover slip

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