Karson had a lamb born with abnormally long and bent legs. The lamb shows signs of which disorder?

The condition described, with the lamb exhibiting abnormally long and bent legs, is indeed indicative of arthrogryposis. Arthrogryposis is characterized by joint contractures that often lead to deformities such as bent or twisted limbs, which aligns with the symptoms presented.

Hypotrichosis refers to hair loss or sparse hair growth and would not be relevant to a discussion about leg deformities. Osteochondrosis involves the abnormal growth of cartilage and can lead to joint pain and dysfunction but typically does not manifest as long, bent legs specifically. Polydactylism is a condition characterized by the presence of extra digits and would not correlate with limb deformities as described.

Therefore, the correct answer emphasizes the specific physical deformities characteristic of arthrogryposis, making it the most appropriate diagnosis for the lamb's condition.