Evolution

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What is a mutation?

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A mutation is a change in the DNA sequence that can lead to changes in the structure and function of proteins.

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What is a nonsense mutation?

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A nonsense mutation is a type of mutation that introduces a premature stop codon in the DNA sequence, leading to incomplete proteins.

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What is a missense mutation?

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A missense mutation is a type of mutation that results in the substitution of one amino acid for another in a protein, potentially altering its function.

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What is a silent mutation?

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A silent mutation is a mutation that does not change the amino acid sequence of a protein, often because of redundancy in the genetic code.

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What is a deletion mutation?

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A deletion mutation occurs when one or more bases are removed from the DNA sequence, which can lead to frameshift mutations.

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What is an insertion mutation?

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An insertion mutation occurs when one or more bases are added to the DNA sequence, which can also lead to frameshift mutations.

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What are homologous structures?

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Homologous structures are anatomical features in different species that share a common ancestry, even if they have different functions.

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What are analogous structures?

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Analogous structures are features in different species that serve similar functions but do not share a common ancestry.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is genetic drift?

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Genetic drift is a mechanism of evolution that refers to random changes in the frequency of alleles in a population.