alleryStart learning →Which comparison of cytochrome c sequences showed no difference at all?
AHuman against rhesus monkey
BHuman against yeast
CHuman against chimpanzee
DRhesus monkey against yeast
Answer & Solution
Correct answer: C. Human against chimpanzee
1. Evolutionary kinship can be assessed by measuring similarities among protein sequences.
2. Comparing human and chimpanzee cytochrome c sequences found no sequence difference.
3. Comparing human and rhesus monkey sequences found a single difference, in one amino acid.
4. Comparing human with yeast showed a difference at the 44th position.
5. So the closer the kinship, the fewer the differences, and the chimpanzee comparison is the one with none.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 3 "Biological Macromolecules", section 3.4 Proteins_
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