in terms of positional information , since an absence of contact between tissues from two opposite sides results in a lack of normal development , we can conclude that positional values located on either side of , the centre of , at least , one transverse axis should be in contact to allow limb development , i.e . a regenerated limb or nerve-induced supernumerary limbs or supernumerary limbs .
C1517884
limb development
C0015385
limbs