SEX LINKED DOMINANT GENES
( SILVER, BANTAM AND BARRING )
In poultry the sex of any chick is determined by the hen not the cockerel.
The cockerel carries two Z chromosomes so he is ZZ.
The hen carries one Z chromosome and one W chromosome so she is ZW.
The cockerel must pass one of his Z chromosomes onto his offspring so any sex linked genes that are on that chromosome such as Silver, Bantam, Barring and Chocolate will be inherited.
The hen can pass either her Z or her W chromosome on to her offspring. If she passes her Z chromosome on her chicks will be male and they will inherit all the sex linked genes that are on that Z chromosome but if she passes her W chromosome on, her chicks will be female and they will inherit none of the sex linked genes she is carrying.
Genes that are sex linked can only be carried on the male chromosome.
TURNING A LARGE FOWL INTO A BANTAM USING THE BANTAM GENE
A Bantam cockerel over a Large Fowl hen.
This will reduce the size of all the chicks hatched.
A Large Fowl cockerel over a Bantam hen.
This will reduce the size of only the male chicks hatched.