Some dogs have erect ears; others have drooping ears. Some dogs bark when following a scent; others are silent

Question

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 F2 generation

please help. thanks.

Answer 1

b. The dogs with both recessive characteristics will be pure breeding.

Answer 2

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