PLATE 9
Feathers showing complete (1) or incomplete (2 and 3) change from hen-feathering to cock-feathering (1ª, 2ª, 3ª) after castration.
PLATE 10
Normal. 1, 2; transitional, 1ª, 2ª, and changed-over feathers, 2ᵇ, of Sebright, 3, 4 and 5. Feathers from F₂ birds.
FOOTNOTES:
[1] The expectation for 1 dominant and 1 recessive factor is so nearly the same as for 1 dominant alone that for the numbers obtained no difference between the two cases could be detected.
[2] There is one other bird, not given in the above list, that is pure Sebright except that his legs are yellow. Until I find out by further breeding of the Sebright stock whether yellow legs are present in it, this case must remain doubtful. On the basis of a two factor color-difference one Sebright (as to color) is expected in 16 birds, and one in 64 on a three factor basis. Some Sebrights had been raised along with the back cross, hence the possibility of contamination.