| A | B |
| degenerate | to undergo evolution toward an earlier or less highly organized |
| eugenics | a science that deals with the improvement of inherited qualities |
| gendarme | a member of an armed national police force especially in France [from French gendarme "policeman", derived as a singular form from earlier gendarmes, gens d'armes, literally "men of arms (weapons)" |
| gender | either of two groups into which many living things are divided |
| genealogy | the line of ancestors of a person or family or a history of such |
| generation | those having the same parents and being a step in a line |
| generic | not protected by a trademark registration |
| gentleman | a man of good birth and position |
| genuine | being actually what it seems to be |
| indigenous | produced, growing, or living naturally in a particular region or |
| ingenious | natural ability or desire to do |
| progeny | human descendants or animal offspring |
| regenerate | to renew (a lost or damaged body part) by growth of new tissue |