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BIOLOGY Chapter 10: Patterns of Inheritance Name:________________________ Section Goal: The student will explain how sex-linked genes produce different inheritance patterns in males and females and explain why most sex-linked disorders are more common in males. Vocabulary: 1. Sex-linked gene Concept 10.5: Sex-Linked traits have unique inheritance patterns I. Sex-linked Genes A. Many species have sex chromosomes, designated X and Y that are associated with determining an individual’s sex XX= Female, while XY= Male B. Any gene located on a sex chromosome is called a sex-linked gene C. Sex-linked genes were discovered by Thomas Hunt Morgan while studying fruit flies II. Sex-Linked Disorders A. A number of human conditions, including red-green color blindness and hemophilia are inherited as sex linked recessive traits B. It takes two copies of the allele to be present in females for them to show signs of the disorder while it only takes one in males Lesson Reflection: Complete Sex Linked Traits Worksheet Lesson Assessment: 1. Describe why one would expect to find more white-eyed male fruit flies than white-eyed females in a natural population. 2. A man with hemophilia and a homozygous non-hemophiliac woman have a son. Is it possible that the son will inherit hemophilia? Why or why not? Summary of Key concepts: Summary of Key Concepts for 10.5 Technology/Application/Connection to real-world: