How many recessive alleles for a trait must an organism inherit in order to exhibit that trait?

Only one hence it is the dominant trait. So with the alleles A (dominant) and a (recessive), AA and Aa will show the dominant trait, and aa will show the recessive trait.

An organism must inherit two recessive alleles: one from each of their parents.

Except in rare cases, you can only inherit one allele per parent per trait (for those of you that don't know, that's two alleles). A recessive trait will be shown if both alleles are for said...

Such an organism would be called heterozygous for the corresponding trait.

That's what I wanna know. I'm doing this for home work and I can't find it anywhere! :/