Can two plants with white flowers produce offspring with purple flowers?

Yes, if both parents are heterozygous for the trait.

Explanation:

For example, they may recognize that a plant with white flowers crossed with itself or another plant with white flowers will produce only white flowered plants, while a purple-flowered plant crossed with itself or another purple-flowered plant sometimes produces white-flowered offspring.

the correct answer is sex-linked recessive.

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