Understanding Mutations in DNA
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Questions and Answers

How do mutations affect an organism's DNA?

  • Mutations have no impact on an organism's DNA.
  • Mutations can cause changes in an organism's appearance, behavior, and physiology. (correct)
  • Mutations always improve an organism's DNA structure.
  • Mutations only affect an organism's appearance, not behavior.

    • What is the role of mutations in evolution?

  • Mutations always lead to the extinction of species.
  • Mutations are essential for evolution to occur. (correct)
  • Mutations have no impact on the process of evolution.
  • Mutations hinder the process of evolution.

    • What are alleles?

  • Different versions of the same genetic information created by mutations (correct)
  • Mutations that occur in a single generation
  • An organism's DNA unaffected by mutations
  • A term used to describe genetic clones

    • How do variations created by mutations help organisms?

    <p>Variations help organisms survive and reproduce.</p> Signup and view all the answers

    What happens to variations that hinder an organism's survival?

    <p>The organism dies and the variations are eliminated from the population.</p> Signup and view all the answers

    Why are mutations often considered essential despite being associated with errors?

    <p>Because they introduce variations that are crucial for evolution.</p> Signup and view all the answers

    What is natural selection?

    <p>A process where variations beneficial for survival and reproduction are passed on.</p> Signup and view all the answers

    What are somatic mutations?

    <p>Mutations that occur in non-reproductive cells</p> Signup and view all the answers

    Which type of mutation can lead to cancer?

    <p>Somatic mutations</p> Signup and view all the answers

    What is an example of a germ-line mutation?

    <p>Albinism</p> Signup and view all the answers

    What type of mutation affects short nucleotide sequences?

    <p>Gene-level mutations</p> Signup and view all the answers

    Which is an example of a chromosomal mutation?

    <p>Down syndrome</p> Signup and view all the answers

    What causes spontaneous mutations?

    <p>Chance</p> Signup and view all the answers

    What is a substitution mutation?

    <p>When one codon is switched with another codon</p> Signup and view all the answers

    Which is NOT a type of mutation mentioned in the text?

    <p>Duplication mutation</p> Signup and view all the answers

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