Pleiotropy (A) refers to the cross of F1 with a dwarf plant (ii).
Codominance (B) refers to single gene related to more than one character (iv).
Test cross (C) refers to genes that code for a pair of contrasting traits (i).
Alleles (D) refers to the F1 generation resembling both parents (iii). Final Answer:
A-ii, B-iv, C-i, D-iii