Before testing the pea plants, mendel formed a five-part hypothesis. what did mendel include in his hypothesis? check all that apply.

a. a pair of factors (known as genes) control traits.

b. one gene comes from each parent for every trait.

c. each trait is passed from generation to generation.

d. some traits are passed together from generation to generation.

e. when gametes are formed, genes separate.

f. if there are two unlike genes, one may be seen while the other is hidden.