AP Bio Insta-Review Topic 6.7*: Mutations

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What is a deletion mutation?

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A deletion mutation is a type of mutation where a section of DNA is removed, resulting in a shorter chromosome. This can lead to genetic disorders, such as Cri-du-chat syndrome.

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Does natural selection affect genotype?

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True. Natural selection can influence the frequency of certain genotypes in a population based on their adaptive advantages.

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What is a missense mutation?

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A missense mutation is a type of point mutation that results in a change in one amino acid in a protein, potentially altering its function.

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What is a frameshift mutation?

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A frameshift mutation occurs when one or more nucleotide bases are added or deleted from the DNA sequence, shifting the reading frame and altering all subsequent amino acids.

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What is a silent mutation?

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

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What is a nonsense mutation?

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A nonsense mutation is a type of mutation that creates a premature stop codon in the protein sequence, leading to a truncated and usually nonfunctional protein.

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What is the difference between chromosomal mutations and point mutations?

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Chromosomal mutations involve changes in the structure or number of chromosomes, while point mutations are changes in a single nucleotide base pair.

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What is the significance of mutations in evolution?

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Mutations introduce genetic variation, which is essential for natural selection and evolution, allowing populations to adapt to changing environments.

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What are the four main types of chromosomal mutations?

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The four main types of chromosomal mutations are deletions, duplications, inversions, and translocations.

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How can mutations be beneficial?

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Beneficial mutations can provide an advantage in survival and reproduction, leading to increased fitness in a particular environment.