Categories: Limbs / fins / digit / tail phene

Single-gene trait/disorder: yes

Mode of inheritance: Autosomal recessive

Disease-related: yes

Key variant known: no

Species-specific description: Abnormal limb development characterised as complete absence of the tarsometarsals and severely hypoplastic development of the metacarpals was described in a strain of light brown leghorn chickens (Smyth et al., 2000).