Some dogs have erect ears; others have drooping
ears. Some dogs bark when following a 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 offspring are purebreeding.
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 F1
generation.
Answer: b
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