Mutations

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by javiergimeno
Last updated 6 years ago

Discipline:
Science
Subject:
Human Anatomy

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Mutations

MUTATIONS

What is a mutation?

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Real muations in animals

Types of mutations

Progeria

Real cases in humans

The classic form of the disease, called Hutchinson-Gilford Progeria, causes accelerated aging. Most children who have progeria die at the age of 13, but some can live into their 20s. It affects as few as one per eight million live births. The disease is caused by a mutation in the LMNA gene, a protein that provides support to the cell nucleus.

Mutations are mistakes in a cell's DNA. These mistakes are necessary because they increase the genetic variation of individuals in a comunity. However, mutations can sometimes be harmful to individuals, such as in the case of cancer and genetic conditions.

The rate of muations increases greatly when an organism is subjected to agents known as mutagens.- Physical mutagens: Radiation can cause damage to genetic material.- Chemical mutagens: Many substances such as certain pollutants can cause changes in genes.- Biological mutagens: Some viruses can increase the frequency of genetic mutations.

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

Causes of mutations

‘We’ The Two-Headed Albino Rat Snake

‘Octogoat’ The Eight-Legged Goat


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