Media Terminology...

Memes: are certain thoughts and beliefs that are usually transmitted from an individual or a group of people to others. This means that someone's small initial idea (the minority) develops into something bigger (the majority) like a trope.

Tropes: are reoccurring elements that continue to grow, from the repetition of someone's original idea. Generally Tropes are building blocks of texts, meaning they are  closely related to memes. For example, someone starts of a new trend in the music industry and word gets around, which then develops this small idea into a trope due to the copying of the initial idea.