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s2008m [1.1K]
3 years ago
5

Comparable segments of the mitochondrial DNA sequences of two similar species are shown below. This segment of DNA mutates at a

rate of one base pair per 33 million years. Based on these DNA sequences, how long ago did the two species diverge from a common ancestor?
Species A mtDNA sequence: TACAAGATAC
Species B mtDNA sequence: TACGCGTAAC

a. 99 million years ago
b. 33 million years ago
c. 66 million years ago
d. 132 million years ago
Biology
2 answers:
mel-nik [20]3 years ago
7 0
132 million years ago
jeka57 [31]3 years ago
7 0
Pretty sure it's 66 million years (c) because there are 4 differences in total, then divide that in 2 to get 2, then multiply that by 2 to get 66 million. I'll tell you if it's right I'm taking the quiz right now. Yeah it was right
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