Japanese bantams carry a gene (inheritance factor) which transmits short-leg
length and another that carries normal leg length. If two birds are mated, each
parent transmits both factors to the offspring. An embryo that receives the
short-legged gene from both parents cannot hatch, but dies in the shell. so
overall breeding results will resemble the following :-
* 25% of embryos will receive double short-legged genes; this pure
short-legged condition is always lethal.
* 50% of embryos will receive one short-legged gene and one normal-legged
gene, and as the short-legged gene is dominant, these will appear short-legged.
* 25% of embryos will receive double normal-legged genes and will have longer
legs than the breeder wishes. If these birds were mated together they would
never produce short-legged Japanese bantams.

Short leg
length
Long leg length