Natural Selection, Operating on Which of the Following Genetic Changes

question 8

Multiple Choice

Natural selection, operating on which of the following genetic changes, most likely resulted in the loss of ventral spines in modern freshwater sticklebacks?

• A) duplication of the Pitx1 gene
• B) deletion of the Pitx1 gene
• C) point mutations in the Pitx1 gene
• D) silencing of the Pitx1 gene

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