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MCAT Question A Day - 3/20/14

The pedigree in the following diagram represents the inheritance of deaf-mutism over three generations within a family. (An arrow on a circle is a male, and a cross below a circle is a female; affected individuals have blackened circles). What kind of trait is deaf-mutism?

A.  Autosomal dominant
B.  Autosomal recessive
C.  Sex-linked dominant