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Transcript of Mutations
Nonsense: Could result in a stop codon, ending the protein sequence.
Crossing Over: Chromosomes exchange sections of DNA.
Insertion: a DNA base (nucleotide) is
inserted into a sequence.
Bean Stalk Mutation!
*A mutation is a permanent change in DNA*
Mutations can be the result of:
1) A mistake in replication or cell division
2) A mutagen: something in environment that can change DNA
Missense: Only 1 amino acid changes and the rest remain the same.
Which is which?
Deletion: A DNA base (nucleotide) is
deleted from a
*Shifting the DNA sequence over can disrupt many amino acids and in turn, large amounts of the protein.*
This is a good thing because it results in genetic variation!
Mutant sea creature
*The other chromosome is lacking some genes.
*One chromosome has a duplicate of some genes.
Gene Translocation: Exchange of DNA on non-homologous chromosomes.
Real life example:
Pale blue grass butterfly
This is very often fixed during DNA replication
a change in the sequence of nucleotides in DNA*
Change that occurs in a chromosome
When one nucleotide changes, but the amino acid stays the same.
Imagine Minions go through Meiosis to produce sex cells. Describe if you think crossing over occurs?
Homologous chromosomes can cross-over unevenly
There are 2 categories of genetic mutations