What trait only appears when a organism is a homzygous

Both can show.

Explanation:

The genotype can look like the following:

TT <= Homzygous Dominant

tt <= Homzyogous Recessive

Tt <= Heterzygous

See? It would be hard to determine exactly which trait would show without the second half of the name! (By the way, I can't say the proper names so I apologize)

I hope this helps! ^-^

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

do yall know the answer?