Question: Take a look at the -globin and -globin sequences in Figure 28.11. Which sequences are more similar, the globin in humans and the

Take a look at the α-globin and β-globin sequences in Figure 28.11. Which sequences are more similar, the α globin in humans and the α globin in horses, or the α globin in humans and the (3 globin in humans? Based on your answer, would you conclude that the gene duplication that gave rise to the α-globin and β-globin genes occurred before or after the divergence of humans and horses? Explain your reasoning.

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