The example of ocean and lake stickleback fishes indicates that morphology can be altered
A. only by changing the sequences of protein-coding genes.
B. by altering the expression of a developmental gene in some parts of the body but not others.
C. by environmental factors (in this case, pollution).
D. by the elimination of a gene (Pitx1) from a population, which leads to loss of the trait (body armor and spines).
Answer:B
The example of ocean and lake stickleback fishes indicates that morphology can be altered
A. only by changing the sequences of protein-coding genes. B. by altering the expression of a developmental gene in some parts of the body but not others. C. by environmental factors (in this case, pollution). D. by the elimination of a gene (Pitx1) from a population, which leads to loss of the trait (body armor and spines).