[Campbell Biology P.384] Based on the "How can one change in DNA result in such a dramatic c... | Practice Question

Based on the "How can one change in DNA result in such a dramatic change in appearance?" diagram, what is the consequence of the mutation in the gene for pigmentation?

  • A: The mutation directly alters the phenotype to "No pigment" without affecting the protein.
  • B: The mutation leads to the production of a non-functional enzyme, resulting in "No pigment."
  • C: The mutation causes the gene to be transcribed into a different type of DNA, leading to "No pigment."
  • D: The mutation prevents transcription altogether, leading to "No pigment."

Explanation

The diagram clearly illustrates that a mutation in the 'Gene for pigmentation' leads to the production of a 'Protein: Enzyme required for pigment synthesis does not work'. This non-functional enzyme then results in the 'Phenotype: No pigment'.