character: Dr. Thomas Hunt Morgan
topic: Discovering Sex-Linked Inheritance
grade: 9
subject: Biology
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character: Morgan's Fruit Flies
topic: Model Organisms in Genetics
grade: 9
subject: Biology
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character: X and Y Chromosomes
topic: Basics of Sex Chromosomes
grade: 9
subject: Biology
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character: Heredity and Genetics
topic: Foundations of Genetic Inheritance
grade: 9
subject: Biology
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