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The document serves as a guide for understanding pedigree charts, which are tools used to trace traits through family generations and predict if individuals are carriers of specific diseases. It explains how to read these charts, including the representation of males and females, the significance of shaded and unshaded shapes, and provides an example related to color blindness.

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How do you read a pedigree chart?

In human genetics, pedigree diagrams are utilized to trace the inheritance of a specific trait, abnormality, or disease. A male is represented by a square or the symbol ♂, a female by a circle or the symbol ♀.

What does a slash mean in a pedigree?

Figure 1 shows an example of a pedigree. The square symbol denotes male, a circle female and a diamond, an unknown sex. The diagonal slash on the symbol indicates a deceased member.

What does a pedigree chart uses specific symbols to indicate?

Question: A pedigree uses specific symbols to indicate genetic information about related individuals.

What do the symbols of a pedigree mean?

Someone with the phenotype (trait) in question is represented by a filled-in (darker) symbol. Heterozygotes, when identifiable, are indicated by a shaded dot inside a symbol or a half-filled symbol. Relationships in a pedigree are shown as a series of lines.

What are the symbols used in human pedigree analysis?

In a pedigree, a circle represents a female, and a square represents a male. A filled-in circle or square shows that the individual having the trait being studied or affected individual.

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What does the pedigree diagram represent?

Definition. A pedigree, as related to genetics, is a chart that diagrams the inheritance of a trait or health condition through generations of a family. The pedigree particularly shows the relationships among family members and, when the information is available, indicates which individuals have a trait(s) of interest.

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How do you read a pedigree chart?

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What does the pedigree diagram represent?

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