Mutation

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by adriclau
Last updated 5 years ago

Discipline:
Science
Subject:
Genetics

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Mutation

Gene mutations:The alteration affects the chemical structure of the DNA within the genes.Chromosome mutations:The alteration affects the structure of the chromosomes.Numerical mutations:The alteration affects the number of chromosomes.

MUTATION

TYPES OF MUTATION

A mutation is a permanent change in the DNA sequence of a gene. Mutations in a gene's DNA sequence can alter the amino acid sequence of the protein encoded by the gene.

Subtypes of mutation

Deleiton: A piece of a chromosome is missing. This often causes anomalies in the skeleton and intellectual disabilities.Duplication: There are cases when part of a chromosome is repeated. The excess of genes causes diseases which are more or less serius, depending on the size of the duplication and which chromosomes are involved.

Inversion: A piece of chromosome is reserved. This does not neccesarily affect the expression of the gene.Translocation: A piece of a chromosome becomes attached to a different chromosome.

DNA fails to copy accurately:Most of the mutations that we think matter to evolution are "naturally-occurring." For example, when a cell divides, it makes a copy of its DNA and sometimes the copy is not quite perfect. That small difference from the original DNA sequence is a mutation.

External influences can create mutationsMutations can also be caused by exposure to specific chemicals or radiation. These agents cause the DNA to break down. This is not necessarily unnatural

A change in or the process of changing, e.g. nature, form or quality.A permanent, heritable change in the nucleotide sequence in a gene or a chromosome; the process in which such a change occurs in a gene or in a chromosome.A mutant, or an individual exhibiting such a change.

CAUSES OF MUTATION:

BIOLOGICAL

BIOLOGICAL

http://refactoring.info/tools/Immutator/

http://de.wikipedia.org/wiki/Mutation

http://mthfr.net/mthfr-mutations-and-the-conditions-they-cause/2011/09/07/

http://www.scienceclarified.com/Mu-Oi/Mutation.html

http://info-dna.blogspot.com.es/2011/09/dna-damage-and-mutation.html

http://rosalind.info/problems/hamm/

http://www.ibtimes.com/chilling-images-human-mutation-across-world-photos-840275

http://www.angelfire.com/mi/dinosaurs/mutations.html

http://evolution.berkeley.edu/evosite/evo101/IIIC3Causes.shtml

http://www.heritagedaily.com/2012/11/most-of-the-harmful-mutations-in-people-arose-in-the-past-5000-to-10000-years/65774


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