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Locus am locus
Genetic symbol am
Common name Amputated
Inheritance Autosomal recessive
Mutation type Morphological
Description Missing tips of toes.
History Discovered in squabbing Kings, 1945.
Commonly found in breeds such as: Very rare

Amputated or amputated toes (symbol am) is a recessive morphological mutation located at the am locus.


Homozygous (am//am) pigeons are missing the tips of some or all of their toes. Occasionally also wing tips are missing and a "hook beak" my be present. Heterozygotes (am//+) appear normal.


Amputated is an autosomal recessive mutation. This means that both parents need to carry the mutant gene for it to express in the next generation. As a recessive mutation, it is possible for this mutation to be carried by a bird who does not visually express it.


This mutation was first identified in squabbing King pigeons in 1945 and investigated by WF Hollander.

See also

Polydactyly - another mutation of the feet and toes.