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Biology 22 Online
OpenStudy (anonymous):

What does a half-shaded circle or square represent on a pedigree diagram? A. A person who is heterosexual B. A person who is heterozygous for a trait C. A person who is homogenous for a trait D. A person who is homozygous for a trait

OpenStudy (anonymous):

http://www.glencoe.com/sec/science/ose/bdol2005/ca/docs/chap12.pdf I think B, theres the link to the book that has everything youve been asking :)

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