The geneticists atudying the alien organisms have deciphered their genetic code. For familarity, they have used A, C, G, and T to indicate the bases in this code.
A comparabie genetic sequence in each alien has been identitied in the genes that code for eye growth. This genetic sequence has allowed the aliens to be divided into six groups, with the single-tail, three-oye group apit in halt. The geneticists also atudied several outgroup species (not shown) to comple a likoly ancestral DNA sequence. From this information, they have constructed four possible phylogenatic trees.
\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|}
\hline site & 1 & 2 & 3 & 4 & & & & & & 9 \\
\hline ancestral & T & C & A & c & & & & c & & T \\
\hline group 19 & T & C & c & C & T & T G & & c & & T \\
\hline group 23 & T & G & A & c & T & , A & & c & A & \\
\hline group 2b & T & O & A & 3 & A & & & o & & \\
\hline group 3 & T & G & A & & A & & & c & & \\
\hline group 4 & C & G & A & c & T & & & T & o & C \\
\hline group 5 & C & G & A & c & T & & G & & & c \\
\hline
\end{tabular}
Based on this genetic information, which phylogenetic tree is most parsimonious?
Select the most parsimonlous troe. If there is a tie, select both trees. (For help approaching this problem, open Hint 2.)