Hydrangea Plants of the Same Genotype Are Planted in a Large

question 36

Multiple Choice

Hydrangea plants of the same genotype are planted in a large flower garden. Some of the plants produce blue flowers and others pink flowers. This can be best explained by which of the following?

• A) the knowledge that multiple alleles are involved
• 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

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