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7 Cards in this Set
- Front
- Back
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Mutations...
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Changes in the genetic material of a cell of virus.
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Point mutations...
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Chemical changes in just one base pair of a gene.
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Types of Point Mutations...
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--Base-pair substitutions.
--Base-pair insertions or deletions. |
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Types of Substitutions
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Base-pair substitution replaces one nucleotide and its partner with another pair of nucleotides.
Silent mutations have no effect on the amino acid produced by a codon b/c of redundancy in the genetic code. Missense mutations still code for an amino acid but not necessarily the right amino acid. |
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Insertions and deletions...
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additions or losses of nucleotide pairs in a gene.
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Insertion or deletion of nucleotides may result in
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frameshift mutation.
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Although spontaneous mutations can occur during DNA replication, recombination or repair
Mutagens... |
Are physical or chemical agents that can cause mutations.
-Mutagens change DNA bases such that DNA polymerases do not effectively proofread and repair mistakes. |
