mendel studied \factors\ that allowed for physical characteristics, which can have alternate versions, to be…

mendel studied \factors\ that allowed for physical characteristics, which can have alternate versions, to be passed onto offspring. what are these factors called?\nplants\ntraits\nalleles\nphenotypes
Answer
Brief Explanations:
Mendel's "factors" are genes, and alternate versions of genes are alleles. Traits are the physical characteristics themselves, phenotypes are the observable expressions of traits, and plants are the organisms he studied.
Answer:
C. alleles