Difference between revisions of "Point mutation"
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| − | A point | + | A '''point mutation''' is the most limited type of [[mutation]], whereby a single base [[nucleotide]] is replaced with another nucleotide. Sometimes the expression "point mutation" can also include the addition or subtraction of a single base pair. |
| − | The sickle-cell disease is caused by a single point mutation in the beta hemoglobin gene, whereby a GAG codon is converted into GTG. The GTG then mistakenly encodes the amino acid valine instead of glutamic acid. | + | The sickle-cell disease is caused by a single point mutation in the beta [[hemoglobin]] gene, whereby a GAG codon is converted into GTG. The GTG then mistakenly encodes the [[amino acid]] valine instead of glutamic acid. |
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| + | [[Category:genetics]] | ||
| + | [[Category:diseases]] | ||
Revision as of 07:52, July 15, 2007
A point mutation is the most limited type of mutation, whereby a single base nucleotide is replaced with another nucleotide. Sometimes the expression "point mutation" can also include the addition or subtraction of a single base pair.
The sickle-cell disease is caused by a single point mutation in the beta hemoglobin gene, whereby a GAG codon is converted into GTG. The GTG then mistakenly encodes the amino acid valine instead of glutamic acid.