Which statements are true regarding law of segregation of principles of inheritance?

(i) Characters are controlled by discrete units called factors.

(ii) Expression of both parental characters in a monohybrid cross in the F 1 .

(iii) Alleles do not show any blending in F 1 .

(iv) Factors are expressed in pairs.

(v) In a similar pair of factors one member of the pair dominates (dominant) the other (recessive).

(vi) Both the characters are recovered as such in the F 2 generation though one of these is not seen at the F 1 stage.

(vii) Parents contain two alleles during gamete formation, the factors or alleles of a pair segregate from each other such that a gamete receives only one of the two factors.