DNA Mutations

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What is a mutation?

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A mutation is a change in the order, number, or type of bases in the genetic code.

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What is a nonsense mutation?

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A nonsense mutation is a type of substitution mutation that results in a stop codon, leading to premature termination of protein synthesis.

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What is a silent mutation?

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A silent mutation is a type of substitution mutation where no amino acids change, meaning the protein remains unchanged.

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What is a frameshift mutation?

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A frameshift mutation occurs when insertions or deletions of nucleotides shift the reading frame of the genetic code, potentially altering all downstream amino acids.

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What causes a frameshift mutation?

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Frameshift mutations are caused by insertions or deletions of nucleotides in the DNA sequence.

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What is a deletion mutation?

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A deletion mutation is a type of mutation where one or more nucleotides are removed from the DNA sequence.

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What is an insertion mutation?

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An insertion mutation is a type of mutation where one or more nucleotides are added to the DNA sequence.

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What is a missense mutation?

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A missense mutation is a type of substitution mutation that results in a change in one amino acid in the protein sequence.

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What is the significance of mutations in evolution?

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Mutations can introduce genetic variation, which is essential for evolution and natural selection.

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What is the role of codons in mutations?

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Codons are sequences of three nucleotides that correspond to specific amino acids; mutations can change codons, affecting protein synthesis.