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Questions and Answers
What is a wild type allele?
What is a wild type allele?
What is the result of a forward mutation?
What is the result of a forward mutation?
What is the cause of mutations in an organism?
What is the cause of mutations in an organism?
What is the classification of mutations based on?
What is the classification of mutations based on?
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What is a reverse mutation?
What is a reverse mutation?
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What type of mutation occurs when a purine is replaced by another purine?
What type of mutation occurs when a purine is replaced by another purine?
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What is the term for a single base substitution or deletion?
What is the term for a single base substitution or deletion?
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What type of mutation results in the loss of a block of one or more base pairs from DNA?
What type of mutation results in the loss of a block of one or more base pairs from DNA?
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What type of mutation involves the rotation of a segment of DNA by 180°?
What type of mutation involves the rotation of a segment of DNA by 180°?
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What type of mutation occurs when parts of two non-homologous chromosomes exchange places?
What type of mutation occurs when parts of two non-homologous chromosomes exchange places?
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Study Notes
Mutations
- A mutation is a change in a DNA sequence of an organism
- Types of alleles:
- Wild type allele: common in wild and natural populations
- Mutant allele: can be recessive or dominant
- Causes of mutations:
- Errors in DNA replication during cell division
- Exposure to mutagens
- Viral infection
- Types of mutations:
- Forward mutation: changes a wild-type allele to a different allele
- Reverse mutation: causes a novel mutant allele to revert back to wild-type
Types of Mutations
- Substitution: replacement of a base by another base
- Transition: purine replaced by another purine, or pyrimidine replaced by another pyrimidine
- Transversion: purine replaced by a pyrimidine, or pyrimidine replaced by a purine
Other Types of Mutations
- Point mutation: a single base is substituted/deleted or changed
- Deletion: a block of 1 or more base pairs is lost from DNA
- Insertion: a block of 1 or more base pairs is added to DNA
- Inversion: a segment of DNA is rotated 180°
- Reciprocal translocation: parts of two non-homologous chromosomes exchange places
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Description
Learn about the different types of mutations, including wild type alleles, forward mutations, reverse mutations, and more. Understand how mutations occur and their effects on an organism's DNA.
