All traits except the gonads by which males and females differ externally and internally.
Secondary sex characters, secondary sexual characters
Definition
Related terms
Scratching shed, room, area
An area that allows birds to scratch.
Selection
The choice of individuals within a population to achieve a defined breeding obje...
Selection base
The base population within which selection is carried out.
Selection criterion
A measured trait or condition used as the basis for selection.
Selection differential
The difference between the mean of a selected group and the mean of the original...
Selection effect
The improvement achieved per unit of time as a result of purposeful selection (g...
