Two New Pure-Breeding Strains of Mouse (Strain 1 and Strain

Multiple Choice

Two new pure-breeding strains of mouse (strain 1 and strain 2) have been obtained.Crosses between strain 1 and wild type,as well as crosses between strain 2 and wild type and between strain 1 and strain 2 always produce 100% wild-type mice. What kind(s) of interactions can be deduced from these results?

A) complementation only
B) dominance only
C) epistasis only
D) complementation and dominance
E) complementation,epistasis,and dominance