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Does it mean a person who is neither a male or a female, a homosexual or an individual whose sex is unspecified?

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    $\begingroup$ I find myself voting to close a lot of your questions as unclear or homework - could you start making effort to make questions answerable and effort to answer for yourself $\endgroup$
    – rg255
    Mar 22 '16 at 6:21
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    $\begingroup$ A simple google search gives tons of answers. Try not to ask too trivial questions just for the sake of posing a question. $\endgroup$
    – Ebbinghaus
    Mar 22 '16 at 6:26
  • $\begingroup$ I'm sorry. I'll keep it in mind. $\endgroup$
    – Tyto alba
    Mar 22 '16 at 18:47
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The figures in this article show symbols commonly used in pedigrees. Squares represent males, circles represent females, and diamonds depict individuals of unknown or, for reasons of confidentiality, disguised gender. A double line between parents indicates consanguineous marriages (between blood relatives) (see Figure 3). Filled symbols represent individuals who display a certain trait, such as an inherited disease. Bars next to the symbols represent genetic loci, and different alleles are color-coded. Diseasecausing mutations are shown as stars or crosses. Symbols that are half filled indicate heterozygous individuals, but often this information isn't known.

From Wikipedia:

If the sex of the person is unknown a diamond is used

Pedigree

Sources:

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