Yellow stripes because it is dominant.
Well,
One could add many different prefixes to tropism to get various results.
Photos + tropos = Phototropism = Turning toward the light.
Gravi + tropos = Gravitropism = Turning toward gravity, a.k.a. turning downwards. Plant stems exhibit negative gravitropism, as they grow upwards, against gravity. I would call it "graviphobia."
Hydro + tropos = Hydrotropism = Turning toward water. This is exhibited by plants' roots growing toward water.
Those are the ones that you can look up in a dictionary and find as legit words. These are ones I have just made up, but still make sense (to some degree).
Helio + tropos = Heliotropism = Turning toward the sun. Synonymous with phototropism.
Claudo + tropos = Claustropism = Turning toward enclosed spaces. Sounds silly, but that's what you do to go into an elevator. Synonymous with claustrophilia.
Caput + tropos = Caputropism = Turning toward the head. That's what everyone does when they face the leader of their group.
Astra/stella + tropos = Astrotropism/Stellatropism = Turning toward the star. Basically stargazing.
Biotic. They are part of the atmosphere/ecosystem and can reproduce.
What viral disease now thought to only exist inside a laboratory caused the death of many American Indians after europeans arrived in north American?
smallpox