Content Objectives The learner will (TLW):
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Essential Questions
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what is a mutation?
Any unpredictable change in the structure or the amount of DNA of an organism. Most mutations occur in somatic cells and are not passed down to the offspring. Only those that occur during the formation of gametes can be inherited.
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Types of MUtations
Point mutations are small but significant. Changes often occur in a single nucleotide base.Deletions remove information from the gene. A deletion could be as small as a single base or as large as the gene itself.
Insertions occur when extra DNA is added into an existing gene.
Frame shift mutations result from either the addition or deletion of one or two nucleotide bases. When this occurs the "reading frame" is changed so that all the codons read after the mutation are incorrect, even though the bases themselves may be still present.
Insertions occur when extra DNA is added into an existing gene.
Frame shift mutations result from either the addition or deletion of one or two nucleotide bases. When this occurs the "reading frame" is changed so that all the codons read after the mutation are incorrect, even though the bases themselves may be still present.
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