Homologous Descended from a common ancestor. For molecular sequence data, it is taken to mean that two sequences or even two characters within sequences are descended from a common ancestor. Sequences show a certain amount of similarity. From this similarity value, we can probably infer that the sequences are homologous or not. You are either pregnant or not, two sequences are either homologous or they are not.
Homology see Homologous .
The existance of characters that have been subject to reversals , convergences or parallelisms . Choose the first letter of your term.