An X-linked recessive mutation producing cleft palate, crooked tail, and polydactyly in mice.

Palate-tail-digits abnormality (ptd) is a new X-linked recessive mutation affecting the morphogenesis of the mouse. It maps proximal to Tabby. Hemizygous males and homozygous females exhibit skeletal malformations of the tail, polydactyly of the hind feet, and in about 60% of the cases a cleft palate. A very high level of postnatal mortality is observed even among the mutants without a cleft palate.