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.
Related terms
Damaged eggs, broken eggs
Eggs with severely damaged shells and ruptured shell membranes.
Dark yolk, yellow yolk
More intensely colored yolk material in concentric layers; intensity depends on ...
Day-old chick
A chick from hatch until 24 hours after removal from the hatcher.
Day-old chick box
Cardboard (or plastic crate) adapted for transporting day-old chicks of all poul...
Dead embryos
Embryos in which no signs of life are present; causes vary, most often improper ...
Debeaking, cauterization
Removal of part of the beak in young birds to prevent cannibalism; permitted up ...
