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Ch. 21 - Genomes and Their Evolution
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All textbooksCampbell 11th EditionCh. 21 - Genomes and Their EvolutionProblem 4b

Chapter 21, Problem 4b

Use a highlighter to color any amino acid that varies among the species. (Color that amino acid in all sequences.) a.The C, G, R sequences are identical. Identify which lines correspond to those sequences.

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Welcome back Next. We look at the question based on the sequence alignment of the different species, on what sequence number two humans and chimpanzees differ. So first I'm going to come down to my I have five different species with their sequence alignments here. So I'm going to go ahead and start by highlighting the human sequence and then the chimpanzee sequence, which should make it easy for us to compare the two and see where the difference lies. So I go along here looking to see where there's an amino acid difference and I quickly realize that these there is no difference. These two are identical so there and that leads us right to our answer. This is a nice easy question. The answer is D. None. And we know we can eliminate all the answers that involve a specific sequence. So we limit A, B and C. And our answer is D. And then hope to see you in the next video.
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Use a highlighter to color any amino acid that varies among the species. (Color that amino acid in all sequences.) b. The H sequence differs from that of the C, G, R species at two amino acids. Underline the two differences in the H sequence.

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Use a highlighter to color any amino acid that varies among the species. (Color that amino acid in all sequences.) c. The O sequence differs from the C, G, R sequences at one amino acid (having V instead of A) and from the H sequence at three amino acids. Identify the O sequence.

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Use a highlighter to color any amino acid that varies among the species. (Color that amino acid in all sequences.) d. In the M sequence, circle the amino acid(s) that differ from the C, G, R sequences, and draw a square around those that differ from the H sequence.

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