[Campbell Biology P.331] A gardener plants two hydrangea bushes of the same genetic variety.... | Practice Question

A gardener plants two hydrangea bushes of the same genetic variety. One is planted in basic soil and develops pink flowers. The other is planted in acidic soil with free aluminum and develops blue flowers. This is an example of...

  • A: A narrow phenotypic range.
  • B: The effect of environment on phenotype.
  • C: Pleiotropy.
  • D: Mendelian inheritance with complete dominance.

Explanation

As explained in Figure 14.14, the hydrangea's flower color is directly influenced by the soil's acidity and aluminum content. Since the two plants are genetically identical, the difference in their phenotype flower color is due to the environmental factors.