| Term | Definition |
| history of the descent of a person or a family from an ancestor | genealogy |
| ancestral | genealogical |
| origin | genesis |
| differing in kind; dissimilar | heterogeneous |
| of the same kind; similar | homogeneous |
| make homogeneous | homogenize |
| extermination of a race of people | genocide |
| a kind or type, as in literature or art | genre |
| one complete set of chromosomes | genome |
| the branch of biology dealing with heredity | genetics |
| a specialist in genetics | geneticist |
| a classification of plants and animals | genus |
| the type species of a genus | genotype |
| a great mental capacity | genius |
| naive, simple | ingenuous |
| not candid or frank; insincere | disingenuous |
| friendly; amiable | genial |
| going together well | congeniality |
| to produce offspring | generate |
| universal | generic |