A recessive allele on the Z sex chromosome causes a 30–40% reduction in live weight depending on sex; reproductive ability and viability are not adversely affected; the gene is used in poultry breeding.
Eggs with severely damaged shells and ruptured shell membranes.
More intensely colored yolk material in concentric layers; intensity depends on ...
A chick from hatch until 24 hours after removal from the hatcher.
Cardboard (or plastic crate) adapted for transporting day-old chicks of all poul...
Embryos in which no signs of life are present; causes vary, most often improper ...
Removal of part of the beak in young birds to prevent cannibalism; permitted up ...