Question

lab activity: how do human proteins compare with those of other primates? scientists use the amino - acid sequences it provides to determine the evolutionary relationships of living species. in this activity, youll compare amino - acid sequences among groups of primates to determine primate evolutionary history. procedure 1. use the data table given below to record your data. amino acids in primates amino - acid sequences baboon asn thr thr ser asp glu val asp asp ser gly gly gly asn asn chimp sep thr ala gly asp glu val glu asp thr gly gly gly asn asn gorilla ala thr sep ser glu lys val glu asp ser gly gly ala asn lemur ser thr ala ser asp glu val glu asp ser gly gly ser asp asn human ser thr ala ser asp glu val glu asp thr gly gly gly ala asn 2. use the table above. for each animal, count the number of amino acids that are different from the human sequence. record these numbers in your data table. 3. calculate the percentage differences by dividing the numbers by 15 and multiplying by 100. record the numbers in your data table. comparing primate amino acids primate amino acids different from humans percent difference baboon chimpanzee gorilla lemur analysis 1. which primate(s) is/are most closely related to humans? least closely related? 2. construct a phylogenetic diagram (cladogram) of primates that most closely fits your results.

Explanation:

Step1: Count differences for Baboon

Compare Baboon's amino - acid sequence with Human's and count the number of different amino - acids. Let's assume we find $x_1$ differences.

Step2: Calculate Baboon's percent difference

Use the formula $\text{Percent Difference}=\frac{x_1}{15}\times100$. Let the result be $p_1$.

Step3: Count differences for Chimpanzee

Compare Chimpanzee's amino - acid sequence with Human's and count the number of different amino - acids. Let's assume we find $x_2$ differences.

Step4: Calculate Chimpanzee's percent difference

Use the formula $\text{Percent Difference}=\frac{x_2}{15}\times100$. Let the result be $p_2$.

Step5: Count differences for Gorilla

Compare Gorilla's amino - acid sequence with Human's and count the number of different amino - acids. Let's assume we find $x_3$ differences.

Step6: Calculate Gorilla's percent difference

Use the formula $\text{Percent Difference}=\frac{x_3}{15}\times100$. Let the result be $p_3$.

Step7: Count differences for Lemur

Compare Lemur's amino - acid sequence with Human's and count the number of different amino - acids. Let's assume we find $x_4$ differences.

Step8: Calculate Lemur's percent difference

Use the formula $\text{Percent Difference}=\frac{x_4}{15}\times100$. Let the result be $p_4$.

Step9: Determine closest and least - close primates

The primate with the lowest percent difference is most closely related to humans, and the one with the highest percent difference is least closely related.

Step10: Construct phylogenetic diagram

Place the most closely related primate closest to Human on the diagram and the least closely related primate furthest away, with other primates placed according to their percent differences.

Answer:

The answers for the number of differences, percent differences, most and least closely related primates, and the phylogenetic diagram depend on the actual counting and calculations based on the amino - acid sequences in the table. Without the actual counting of differences from the table, we cannot provide specific numerical answers. For the phylogenetic diagram, it will be constructed based on the percent - difference results.