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Chemical mutagens is when chemicals cause mutations to the DNA.

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Physical mutagens is when something physically changes the structure of a DNA like radiation and x-rays.

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Mutagens is when something causes mutations.

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Nonsense mutation is when there is a change of a nucleotide that makes a codon the codes for a stop codon which makes the protein short.

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Missense mutation is when there is a change in a nucleotide which leads to the change of the amino acid sequence of a protein.

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Silent mutation is when there is a change of a nucleotide but no change in the amino acid sequence of a protien because many codons may code for the same amino acid.

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Frameshift mutation is when one or more nucleotides not divisble by three os added or deleted.

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Point mutation is when there is a change of one nucleotide which could be deletion,insertion or substitution of one nucleotide.

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Single-gene mutations is when there is a change in the nucleotide sequence of a gene.

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Nondisjunction is when 2 chromosomes fail to separate during gamete formation which results in too many or too few chromosomes.

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Translocation is when a part of one chromosome breaks off and attaches to another chromosome.

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Duplication is when a part of a chromosome is duplicated.

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Invertion is when a part of a chromosome breaks to flip and reattach.

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Deletion is when a part of a chromosome is deleted or lost.

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A chromosome mutation is a change the occurs in a chromosome.

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Mutation is a change of a nucleotide of a DNA sequence.