Mutations

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by merilutururu
Last updated 4 years ago

Discipline:
Science
Subject:
Genetics
Grade:
10

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Mutations

MUTATIONS

Def: Alternations and random changes in genes.

27 FEBRUARY

Def: Alterations and random changes in genes

There are 3 main types of mutations1. Gene Mutations2. Numerical mutations3. Chromosome mutations

http://mthfr.net/wp-content/uploads/2011/09/mutation.jpg

1. Gene mutationsAffect the chemical strcuture of the DNA in genes

There are three main causes for MUTATIONS1. Physical2. Chemical3. BiologicalCHEMICAL CAUSATIONS:Mutations can be caused by the exposure to specific chemicals or radiation (gamma or X rays).DNA breaks down and when the cells repair it, some steps are forgotten so the DNA becomes different than the primitive one. That's a Mutation, a change in the DNA's structure.

http://www.scienceclarified.com/photos/mutation-3099.jpg

http://evolution.berkeley.edu/evolibrary/images/evo/radioactive.gifhttp://evolution.berkeley.edu/evolibrary/article/mutations_01

3. Chromosome mutationsAffect the strcuture of the chromosome-Duplication -Inversion-Deletion-Insertion-Translocation

http://www.vce.bioninja.com.au/_Media/block_mutations_med.jpeg

2. Numerical mutationsAffect the number of chromosomes:Autosomal disorders ' Sex-Linked disorders

Biology and Geology4ºAMaría Galán Martínez...


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