BIO take home test - Zak Murdock Period 1 2) Evolutionary...

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Zak Murdock Period 1 2) Evolutionary agents are forces that change the genetic structure of a population. There are several evolutionary agents in which effect the genetics of a population. Two examples of evolutionary agents include mutation and genetic drift. A mutation is any change in an organisms DNA. It is considered the origin of genetic variation. Most mutations are rare, appear to be random and are mostly harmful or neutral. Neutral mutations may change the codon however not the amino acid, therefore they show up but they neither help nor harm. Harmful mutations, such as cancer, most often occur in somatic cells. However, it is possible for harmful mutations to actually become advantageous over time. Mutations can restore a population’s alleles that other agents remove, thus showing that mutations both create and help maintain genetic variation within populations. Along with mutations, genetic drift is another evolutionary agent. Genetic drift is the random loss of individuals and the alleles they possess.
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This note was uploaded on 04/28/2010 for the course PHYSICS 213 taught by Professor Padamsee during the Spring '10 term at Cornell University (Engineering School).

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BIO take home test - Zak Murdock Period 1 2) Evolutionary...

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