TLS Online TPP Program

#Question id: 4985


The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic affects of Pitx1 gene

#Unit 9. Evolution & Diversity of Life Forms
  1. duplication (gain in number).

  2. elimination (loss).

  3. mutation (change).

  4. silencing (loss of expression).