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The Following Sequences Have Been Obtained from a Hypothetical Gene

Question 205

Short Answer

The following sequences have been obtained from a hypothetical gene in three species of Drosophila:
D.melanogaster: GGCTTGTAGCTGTGCTCGCCGCTAGTCGG
D.simulans: AGGCTTGTAGCTGTGCTCGCCGCTAGTAGG
D.erecta: AGGGTAGCTGTGCTCACCGCTCGTCGG
If we assume that each observed substitution is equivalent to 2 nucleotide substitutions, a total of _______ substitution(s) has/have occurred between D.melanogaster and D.simulans.

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