A sex-linked trait Kiwi birds can have is their feather color. Phenotypes: Dark brown feathers and Light brown feathers Dominant: Dark brown feathers Recessive: Light brown feathers
(Bird's chromosomes work the near opposite of mammal's, ZZ meaning male, ZW meaning female) ZBZB: Dark brown feathers (Male) ZBZb: Dark brown feathers, carrier (Male) ZbZb: Light brown feathers (Male) ZBW: Dark brown feathers (female) ZbW: Light brown feathers (female)
Offspring of ZBZb and ZBW: female offspring: ZBW and ZbW 50% chance of having light brown feathers.