Kai looks at a photo of herself with her parents. She notices that, while her features are similar to her parents’ features, they do not appear to be identical. Which explains why this is the case?

Kai’s DNA contains the same four types of bases as her parents’ DNA, but the order of those bases—and therefore the codon sequences—can differ. She inherits a combination of DNA from both parents, which gives her some similar features but not an identical set of traits. Choice A, different codon sequences, best explains the differences.

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