Question

what type of plants did mendel use to start his experiments, which are also known as true - breeding plants?
more common flowers
hybrid flowers
clone flowers
purebred flowers

Explanation:

Mendel used purebred plants (true - breeding) in his experiments. Purebred means that when the plants self - pollinate, they produce offspring with the same traits as the parent. Hybrid plants have a mix of traits from different parents, clone flowers are exact genetic copies (a concept not relevant to Mendel's time in the way we think now), and "more common flowers" is a non - scientific and too vague term for Mendel's experimental setup.

Answer:

purebred flowers