Question

Building phylogenetic trees from dna sequence data

Answer 1

1.Phylogenetic trees represent hypotheses about the evolutionary relationships among a group of organisms.

2.A phylogenetic tree may be built using morphological (body shape), biochemical, behavioral, or molecular features of species or other groups.

3.In building a tree, we organize species into nested groups based on shared derived traits (traits different from those of the group's ancestor).

4.The sequences of genes or proteins can be compared among species and used to build phylogenetic trees. Closely related species typically have few sequence differences, while less related species tend to have more.