Pedigree charts 807

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What is a pedigree chart?

Back

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors, used to analyze the inheritance of traits.

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How is a male represented in a pedigree chart?

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A male is represented by a square in a pedigree chart.

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How is a female represented in a pedigree chart?

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A female is represented by a circle in a pedigree chart.

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What does a filled circle represent in a pedigree chart?

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A filled circle represents an affected female.

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What does a filled square represent in a pedigree chart?

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A filled square represents an affected male.

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What does a half-filled circle or square represent in a pedigree chart?

Back

A half-filled circle or square represents a carrier of the trait.

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What is the significance of generations in a pedigree chart?

Back

Generations in a pedigree chart indicate the lineage and help trace the inheritance of traits through family history.

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How can you determine the number of carriers in a pedigree chart?

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Carriers can be identified by looking for individuals who have a half-filled symbol, indicating they carry the trait but do not express it.

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What is the difference between homozygous and heterozygous individuals?

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Homozygous individuals have two identical alleles for a trait, while heterozygous individuals have two different alleles.

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How can you identify affected individuals in a pedigree chart?

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Affected individuals are identified by filled symbols (squares for males and circles for females) in the pedigree chart.