Podcast
Questions and Answers
Mutations are changes in the _____ sequence that affect genetic information.
Mutations are changes in the _____ sequence that affect genetic information.
DNA
Name the type of mutation that affects a single gene.
Name the type of mutation that affects a single gene.
Gene mutation
Name the type of mutation that affects an entire chromosome.
Name the type of mutation that affects an entire chromosome.
Chromosomal mutation
Mutations can occur in one of how many ways?
Mutations can occur in one of how many ways?
What is it called when a base or bases are added or inserted?
What is it called when a base or bases are added or inserted?
What is it called when a base or bases are deleted or removed?
What is it called when a base or bases are deleted or removed?
What is it called when a base or bases are changed?
What is it called when a base or bases are changed?
If a single letter is changed, what is it called?
If a single letter is changed, what is it called?
When the change occurs that causes a ripple effect or a shift in the way the protein is read, it is called a _____ mutation.
When the change occurs that causes a ripple effect or a shift in the way the protein is read, it is called a _____ mutation.
What can mutations result from?
What can mutations result from?
Any compound that causes a mutation is called a what?
Any compound that causes a mutation is called a what?
Flashcards
Mutations
Mutations
Changes in the DNA sequence that affect genetic information.
Gene Mutations
Gene Mutations
Affect a single gene.
Chromosomal Mutations
Chromosomal Mutations
Affect an entire chromosome.
Addition (or Insertion)
Addition (or Insertion)
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Deletion
Deletion
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Substitution
Substitution
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Point Mutation
Point Mutation
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Frameshift Mutation
Frameshift Mutation
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Causes of mutations
Causes of mutations
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Mutagen
Mutagen
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Study Notes
- Mutations are changes in the DNA sequence that affect genetic information.
- Gene mutations affect a single gene.
- Chromosomal mutations affect an entire chromosome.
- Mutations occur in one of 3 ways: addition/insertion, deletion, substitution.
Types of Mutations
- Addition (or Insertion) involves adding or inserting a base or bases.
- Deletion involves removing a base or bases.
- Substitution involves changing a base or bases.
- If a single letter changes, it is a point mutation.
- A frameshift mutation occurs when the change causes a "ripple effect" or a shift in how the protein is read.
- A deletion causes the sequence to now change to GCC CCA GU from G C CCC AGU.
- This can change not only the individual amino acids, but can alter the overall protein.
- Mutations can occur as a result of exposure to certain chemicals, radiation, or by random chance.
- A mutagen is any compound that causes a mutation.
- Sometimes mutations don't change amino acids or the overall protein because most amino acids have more than one codon.
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