Types of Mutations Ms Blalock Ms Hartsell Mutations

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Types of Mutations Ms. Blalock, Ms. Hartsell

Types of Mutations Ms. Blalock, Ms. Hartsell

Mutations • Definition: Mutations are changes in the sequence of DNA and therefore the

Mutations • Definition: Mutations are changes in the sequence of DNA and therefore the gene. • Mutations can change the way in which a trait is expressed by an organism • However, not all mutations are bad

Did you know? • Mutations occur all the time in your DNA • However,

Did you know? • Mutations occur all the time in your DNA • However, these mutations are usually fixed before they become permanent • Mutations that are not fixed then become permanent changes that can either benefit or harm the organism – Benefit: Cause variation that allows the organism to survive in a changing environment – Harm: Cause disease or death

Types of Mutations • There are essentially three types of mutations • 1. Deletions

Types of Mutations • There are essentially three types of mutations • 1. Deletions • 2. Insertions • 3. Substitutions

Deletion Mutations When one nucleotide base is REMOVED from the DNA sequence. To delete=To

Deletion Mutations When one nucleotide base is REMOVED from the DNA sequence. To delete=To take away

Insertion Mutations When one nucleotide base is ADDED to the DNA sequence. To insert=To

Insertion Mutations When one nucleotide base is ADDED to the DNA sequence. To insert=To put into

Substitution Mutations When one nucleotide base is SWITCHED for another nucleotide in the DNA

Substitution Mutations When one nucleotide base is SWITCHED for another nucleotide in the DNA sequence. To substitute=To replace

Check For Understanding Using the before and after DNA sequence, determine which type of

Check For Understanding Using the before and after DNA sequence, determine which type of mutation has occurred. BEFORE the mutation DNA sequence: TTA GCA TAC GCC AAT AFTER the mutation DNA sequence: TTA GCA TAC GCG AAT Type of mutation: _____________________

Check For Understanding Using the before and after DNA sequence, determine which type of

Check For Understanding Using the before and after DNA sequence, determine which type of mutation has occurred. BEFORE the mutation DNA sequence: TTA GCA TAC GCC AAT AFTER the mutation DNA sequence: TTA GCA TAC GCG AAT Type of mutation: Substitution