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Gene Sequences Across Species
DNA sequences are often used to determine relationships between organisms. DNA sequences
that code for a particular gene can vary widely. Organisms that are closely related will have
sequences that are similar.
Below is a list of sequences for a few organisms:
Human: CCA TAG CAC CTA
Pig: CCA TGG AAA CGA
Chimpanzee: CCA TAA CAC CTA
Cricket: CCT AAA GGG ACG
ased on the sequences, which two organisms are most closely related?