In constructing a pedigree for a man whose maternal grandfather has Huntington's disease, you include the man's maternal grandparents, his parents, his mother's only sister, his three sisters and one brother, and his twin sons
Which pedigree symbol and position would represent his mother's sister? A. The circle on the highest horizontal line above the client's symbol
B. The square on the horizontal line directly above the client's symbol
C. The circle on the horizontal line above the client's symbol that does not directly touch the vertical line leading to the client
D. The square on the same horizontal line as the client's symbol that directly touches the vertical line leading to the client's mother
C
Squares are the symbols for males and circles symbolize the females in a kinship. Therefore, B and D are incorrect because they do not indicate the correct gender. All people who belong to one generation in a family share a horizontal line. The client's mother's sister would be on the same line as the client's mother. His mother and her sister can be distinguished in this pedigree because only his mother would be part of the vertical line connecting this generation to the client.
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