Ortholog These are homologous genes that are found in two different taxa and are performing the same function in each taxon.  Together with paralogs they comprise an homologous superfamily.
 

OTU (Operational Taxonomic Unit) see Taxon.
 
 
 

Choose the first letter of your term.
 

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z