One of the mysteries of the English language finally explained.
A dominant gene located on an autosome; a trait whose inheritance is determined by such a gene.
Of a gene or trait: that is an autosomal dominant. Also: of, relating to, or characteristic of such a gene or trait; determined by such a gene.
Early 20th century; earliest use found in Thomas Hunt Morgan (1866–1945). From autosomal + dominant.
autosomal dominant/ˌɔːtəˈsəʊml ˈdɒmɪnənt/
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