Sunday, March 16, 2014


                     Mutations: a Natural Error

                   Hello and welcome back guys, today we are going to be talking about mutations and how it affects organisms. A quick review of what DNA is, DNA is an incredible molecule that stores all of the  genetic information and all of the body's functions. Now, what a gene is, is a basic unit of hereditary material that can be passed on to your children.



Genes are made up of DNA. Each chromosome contains many genes.


              That can be a problem however. Because genetic mutation can occur and it can cause a lot of problems. What genetic mutation is, is a perminent change in the DNA sequence that makes up a gene. the reason why it happens is because there is an error in copying the bases.





Image of genetic mutation example



            Luckily there is a worker that can fix that problem which is DNA repair. it's role is to repair some of the non-permanent changes to the problem.





DNA Repair Genes

           What's worse is that genetic mutations cause health problems. The three examples to what they caus eare disease, such as Huntington's disease , deformed appearance, such as the Elephant Man, and color blindness.


















There are some benefits for mutations as well. Evolution is the key benefit to mutation because it can develop adaptations and other things in your body like intelligence.



Diagram. The Ultraviolet (UV) light that penetrates our skin is made up of two types of radiation, UV-A rays and UV-B rays. Diagram shows UV-B rays penetrating the top layers of skin, while UV-A rays penetrate deeper. Image copyright medmovie.com.

                 Also, mutations can occur when you aer exposed to ultraviolet radiation, or an error copying DNA during cell division.

Well, see ya later.




  Links:

Gene picture

Mutation

DNA repair picture

Mutation problems

Elephant Man

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