Some Dogs Have Erect Ears; Others Have Drooping Ears

Multiple Choice

Some dogs have erect ears; others have drooping ears. Some dogs bark when following scent; others are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. If two dihybrids are crossed,

A) the most common phenotype is drooping ears and barking.
B) all droopy-eared, silent dogs are pure-breeding.
C) the least common phenotype is drooping ears and barking.
D) there will be no phenotypes or genotypes that resemble the original parents.
E) there will be no offspring that resemble the F ₁ generation.