Select the incorrect match regarding the symbols used in pedigree analysis.

The pedigree chart symbol that represents consanguineous mating (mating between close relatives) is:

The circle (female) and the square (male) are joined by a double line, not a single line as given in the option.

(1) The diamond symbol is used to represent an individual whose gender (sex) is unspecified. If the gender is known, a circle symbol is used to represent a female and a square symbol is used to represent a male.

(2) A shaded symbol represents an affected individual. For example, a shaded circle represents an affected female while a shaded square represents an affected male.

(4) The clear circle and square in the given option represent normal parents and the solid square represents affected male child.