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Introduction to Pedigrees

Introduction to Pedigrees

Genealogy of the Lee family of Virginia and Maryland.
Courtesy of the US Library of Congress.

A pedigree shows how a trait is inherited over several generations. Dr. Lisa Meffert explains why pedigrees are important, and the key factors scientists consider when studying pedigrees.

Author(s): Lisa M. Meffert, PhD
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Albinism: Parent-offspring Relationships

Albinism: Parental Genotypes are Known

Albinism: One Parental Genotype Known

Hairy Ears: An Example

Hairy Ears: Female Sex Determination

Hairy Ears: Male Sex Determination

Hairy Ears: Gene on the Y Chromosome

Hairy Ears: Wild-Type Allele for Normal Ears

Hemophilia: An Example

Hemophilia: Expression of Sex Chromosomes

Hemophilia: Expression of Male Sex Chromosome

Hemophilia: Genotype the Affected Individuals

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