Mating of a Yellow Male Parakeet with a Blue Female

Multiple Choice

Mating of a yellow male parakeet with a blue female parakeet resulted in 18 offspring. Four (two males; two females) had blue feathers, and 14 (eight femalesand six males) had yellow feathers. What allelic combinations and mode of inheritance can you determine from the evidence of the feather colors expressed?

A) Yellow allele dominant; blue allele recessive; autosomal
B) Yellow allele recessive; blue allele dominant; autosomal
C) Yellow allele dominant; blue allele recessive; sex-linked
D) Yellow allele recessive; blue allele dominant; sex-linked