DNA Mutations

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What is a DNA mutation?

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A DNA mutation is a change in the nucleotide sequence of an organism's DNA, which can lead to changes in the structure and function of proteins.

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What are the main types of DNA mutations?

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The main types of DNA mutations are substitution, insertion, deletion, and duplication.

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What is a deletion mutation?

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A deletion mutation occurs when one or more nucleotides are removed from the DNA sequence, potentially leading to a frameshift.

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What is an insertion mutation?

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An insertion mutation occurs when one or more nucleotides are added to the DNA sequence, which can also cause a frameshift.

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What is a substitution mutation?

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A substitution mutation occurs when one nucleotide is replaced by another, which may or may not affect the resulting protein.

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What is a frameshift mutation?

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A frameshift mutation is caused by insertions or deletions that change the reading frame of the genetic code, affecting all downstream codons.

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What is a nonsense mutation?

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

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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 different amino acid being incorporated into a protein.

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What is a silent mutation?

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A silent mutation is a substitution mutation that does not change the amino acid sequence of a protein due to the redundancy of the genetic code.

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What are codons?

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Codons are sequences of three nucleotides in mRNA that correspond to specific amino acids or stop signals during protein synthesis.