The Scot Dumpy, a type of chicken (fowl) from Scotland, can exhibit short-leg length and normal-leg length phenotypes. A breeder crossed two normal-legged Scots Dumpy, and found that all the F1 are normal-legged. When the same breeder crossed a normal-legged fowl with a short-legged fowl, 1/2 of the offspring were short-legged and 1/2 of the offspring were long-legged. Following a third cross, involving two short-legged Scots Dumpy fowl, the breeder observed the following results among 200 offspring counted:

133 short-legged fowl

67 normal-legged fowl

(a) The breeder is confused about the results. Tell the breeder what the last (or third) cross might indicate.

(b) What is the genotype of the short-legged chicken?