The Bantam genes

[ThiefPouter06]

I have read on here that the bantam "condition" is the result of a few genes. Do each of these genes need to be present in the same bird for an expression of the bantam phenotype or just one? I read that some are most are recessive and one is sex linked.
Matt

 

[Year of the Rooster]

There are several genes that cause bantams to be as they are. This link can help explain it better: http://www.edelras.nl/chickengenetics/mutations2.html#gen_mut_dwarf