Final answer:
The most dominant method for constructing phylogeny trees currently is cladistics, using the concept of maximum parsimony to choose the best tree with the simplest evolutionary pathways.
Step-by-step explanation:
The most dominant method for constructing phylogeny trees currently is cladistics, which sorts organisms into clades based on their closest relationships to each other and their common ancestor. Scientists use a concept called maximum parsimony to choose the best tree, which states that events occurred in the most simple and obvious way with the fewest number of character changes throughout the tree. Computer programs search through all possible trees to find the ones with the simplest evolutionary pathways.