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Summary A Level Biology Notes on Mitosis and the Cell Cycle

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- Notes on Mitosis - Notes on the cell cycle










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Mitosis
Created @April 26, 2020 7:50 PM

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Table Of Contents
Chromosones
Coiling
The Cell Cycle
Telomeres




Chromosones
Between nuclear division uncoiling of the chromosones occurs

Most proteins are basic which means Chromosones are made of chromatin
they can interact with DNA which is
Chromatin consists of DNA and
acidic
the proteins it associates with
such as histones

Chromatin exists in two forms

Euchromatin
Loose coil
Where active genes are

Heterochromatin


Mitosis 1

, Tight coil
Inactive genes



🌀 During Interphase mosts of the chromatin exists as euchromatin



This makes it easier for cell machinery to acess genes




🌀 Chromosones are counted by their centromeres. A lone Chromatid is a
chromosone but 2 chromatids are also just 1 chromosone


Each chromatid contains 1 molecule of DNA




The two Chromatids make one chromosone




Each metaphase chromosone has 2 Kinetochores.

One is attatched to each chromatid



Mitosis 2
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