English

haploproficient

From haplo- + proficient.

Proto-Indo-European *sem- ‘one, whole’

Ancient Greek ἁπλόος ‘single, simple’

Latin proficere ‘to go forward, advance, make progress,…’

Latin proficiens ‘advancing etc’

Today it means

adj Having two copies of each gene

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

Etymograph / haploproficient