Genetic abnormalities are a reality for any living organism, and the understanding of these conditions continues
to evolve with scientific advancements.
Leading geneticists in the bovine academic community have increasingly observed that all breeds have hundreds of
mutations in their genome. The American Angus Association's approach to genetic conditions reflects the likelihood
that the discovery of such mutations will continue in the future and at a pace accelerated by new scientific tools.
The Association relies on sound scientific principles to determine policy governing genetic conditions. Through
strategic DNA testing and sound management, breeders may successfully manage these issues in a way that’s beneficial
to the breed and commercial customers.
Genetic Conditions and Genetic Factors
The following abnormalities are considered pathological (disease) conditions of genetic origin. These “genetic conditions”
include an impairment of health or a condition of abnormal function due to an abnormal or mutated gene.
The following information includes commonly asked questions, testing guidelines and Association policy for Arthrogryposis
Multiplex (AM), Neuropathic Hydrocephalus (NH) and Contractural Arachnodactyly (CA), PRKG2 Gene Mutation for Dwarfism (D2),
Myostatin (M1), Oculocutaneous Hypopigmentation (OH) and Osteopetrosis (OS).
Additional information and the complete American Angus Association Genetic Condition Policy is presented in the Breeder’s
Reference Guide. Breeders may also contact the Member Services department with questions.
Genetic Condition Links
Genetic Condition and Genetic Factors Listing
Abnormal Calf Report Form
Recessive Trait Free (RTF) -
Tested free of all simple recessive genetic defects and genetic factors monitored by the Association (RTF).
Genetic Condition Information
Arthrogryposis Multiplex (AM)
Contractural Arachnodactyly (CA)
PRKG2 Gene Mutation for Dwarfism (D2)
Developmental Duplication (DD)
Neuropathic Hydrocephalus (NH)
Oculocutaneous Hypopigmentation (OH)
Sodium Channel Neuropathy (SCN)