North American Veterinary Licensing Examination (NAVLE) Practice Test

Question: 1 / 400

Which cattle breed is most commonly associated with the inherited condition syndactyly?

Angus

Holstein-Friesian

The condition syndactyly, also known as "mule foot," is characterized by the fusion of the toes in cattle, leading to a hoof structure that has a single hoof rather than the typical two-toed structure. Holstein-Friesian cattle are particularly noted for this genetic trait, which can appear in various forms, including complete or partial syndactyly. This breed's association with the condition is well-documented, and it is typically inherited in an autosomal recessive manner, which means that both parents must carry the gene for it to manifest in offspring.

While the other breeds listed may have their own sets of genetic traits and conditions, syndactyly has been prominently observed and reported in Holstein-Friesians, making them the most commonly associated breed with this inherited condition. Understanding genetic conditions like syndactyly is important for breeding programs and animal welfare management in cattle.

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Hereford

Brown Swiss

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