Ten Plants of the Same Genotype Are Planted in a Large

Multiple Choice

Ten plants of the same genotype are planted in a large flower garden. Later that year, some of the ten plants have blue flowers and others have pink flowers. This can be best explained by which of the following statements?

A) multiple alleles are involved in color determining flower color
B) the allele for blue hydrangea is completely dominant over the allele for pink hydrangea
C) the alleles are codominant
D) environmental factors such as soil pH affect the phenotype