A researcher wanted to estimate the evolutionary relationships among 7 species o
ID: 218710 • Letter: A
Question
A researcher wanted to estimate the evolutionary relationships among 7 species of animals. To do this, she isolated the DNA of each species and determined the amino acids resulting from the codons (see figure below). The similarities and differences among these sequences was used to infer which species were most closely related.
Figure 1. Sequences of amino acids for 7 species of animals. The highlighted colors denote codons that call for the same amino acids. A red box is drawn around the 6th codon from the right to help with question 3.
Use this information to answer the following questions.
True/False:
17 For this sequence of DNA, the monkey and the humans share 100% of their amino acids.
18 The amino acids shared by the humans and the monkey likely reflect homology.
19 Codons that call for the same amino acid in all seven species provide the most information about the evolutionary relationships.
20 For the codon shown in the red rectangle, the similarity between the bee and the monkey more likely reflects homoplasy than homology.
21 The horse shares more amino acids with the bird than it does with the human.
Safari File Edit View History Bookmarks window Help chegg.com Take Test: Exam Revi Chegg GuidedS Farnily History A Resea... Chegg. Study Question: Family History A researcher wanted to estimate the evo TEXTBOOK SOLUTIONS EXPERT G&ASearch; Edit q Family History A researcher wanted to estimate the evolutionary relationships among 7 species of animals. To do this, she isolated the DNA of each species and determined the amino acids resulting from the codons (see figure below). The similarities and differences among these sequences was used to infer which species were most closely related. human horse cat bird fish bee Figure 1. Sequences of amino acids for 7 species of animals. The highlighted colors denote codons that call for the same amino acids. A red box is drawn around the 6th codon from the right to help with question 3. Use this information to answer the following questions. True/False: 17 For this sequence of DNA, the monkey and the humans share 100% of their amino acids. 18 The amino acids shared by the humans and the monkey likely reflect homology 19 Codons that call for the same amino acid in all seven species provide the most information about the evolutionary relationships. 20 For the codon shown in the red rectangle, the similarity between the bee and the monkey more likely reflects homoplasy than homology. 21 The horse shares more amino acids with the bird than it does with the human Hide comments (1) Comments anonymous posted 2 days ago Figure not visibleExplanation / Answer
Answer 17
True.
Answer 18
False.
Answer 19
False.
Answer 20
False.
Answer 21
False.
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