English

intragenetic

From intra- + genetic.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁énteros ‘inside, within’

Latin *interus

Latin intrā ‘within’

Proto-Indo-European *ǵenh₁- ‘to beget’

…

Proto-Hellenic *gígnomai

Ancient Greek γίγνομαι ‘I come into being’

Ancient Greek γένεσις ‘origin, source’

English genesis

Today it means

adj Within a gene

Language periods are conventional ranges, not dates for this word.

Etymograph / intragenetic