Black Langshan chickens have feathered legs. When this breed is crossed with a Buff Rock with featherless legs, the entire F1 generation has feathered legs. Of the 360 F2 offspring, 24 had featherless legs and 336 had feathers. 

 

a) What is the mode of interaction in this character?

a) What proportion of the feathered F2 generation could be expected to be heterozygous at one locus and homozygous at the other?