You are studying the source of a new virus that has recently infected humans. You suspect that the virus was transferred from other primates (they exhibit a similar infection), specifically, chimpanzees, gorillas, or orangutans. You sample blood from several infected humans and sequence some viral genes. You then build a phylogenetic tree with the human sequences and all the known strains from each primate. Draw a hypothetical phylogenetic tree that would suggest that the virus came from gorillas and that this transfer occurred twice independently. Label chimpanzee sequences (c), gorilla (g), orangutans (o), and humans (h).

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The Answer of You are studying the source of a new virus that has recently infected humans. You suspect that the virus was transferred from other primates (they exhibit a similar infection), specifically, chimpanzees, gorillas, or orangutans. You sample blood from several infected humans and sequence some viral genes. You then build a phylogenetic tree with the human sequences and all the known strains from each primate. Draw a hypothetical phylogenetic tree that would suggest that the virus came from gorillas and that this transfer occurred twice independently. Label chimpanzee sequences (c), gorilla (g), orangutans (o), and humans (h).

You Are Studying the Source of a New Virus That