from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Originating from the same zygote.
Sorry, no etymologies found.
It arises in one individual but spreads in population in heterozygotic form, untill in becomes frequent enough to produce homozygotic mutants people who inherited it from both parents.
I interviewd Dick Swaab - whose lab did the BSTc stuff - he pointed out that homozygotic twins have far from identical brains at birth.
PERIOD3 (PER3) in response to TSD by using a small group of subjects (n = 24 of various ethnicities) recruited specifically for the homozygotic versions of this polymorphism.
d was set equal to zero if the heterozygote differed less than 5% from the mean of the homozygotic values.