Difference between revisions of "Mutation"
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==Beyond the Curriculum== | ==Beyond the Curriculum== | ||
{{#ev:youtube|https://www.youtube.com/watch?v=vP8-5Bhd2ag}} | {{#ev:youtube|https://www.youtube.com/watch?v=vP8-5Bhd2ag}} | ||
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| + | :[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Deletions (mutations), page 86, GCSE Biology; The Revision Guide, CGP, AQA ''] | ||
Revision as of 23:52, 3 November 2019
Contents
Key Stage 4
Meaning
A mutation is a change to the DNA in a cell which causes a new variant of a gene.
About Mutations
- Mutations occur randomly so they cannot be predicted.
- Most mutations are errors which occur during DNA replication in cell division. However, some can occur due to DNA becoming damaged by ionising radiation.
- Mutations affect gene expression. Since genes act as templates for building protein, if a gene has been altered by mutation the proteins will also be changed.
- Mutations lead to the proteins, coded for by a gene, to have a different shape and function. A mutation may cause the active site of an enzyme to change, leading to a substrate no longer fitting in the active site or, in rare cases, a different substrate fitting the active site.