1. Chapter 6 Modern Genetics Section 2: Human Genetic Disorders What are two major causes of genetic disorders in humans? How do geneticists trace the inheritance of traits? How are genetic disorder diagnosed and treated?

2. Chapter 6 Modern Genetics Genetic Disorders Abnormal conditions that people inherit through genes or chromosomes May be caused by changes in the DNA of genes May be caused changes in the overall structure or number of chromosomes

3. Chapter 6 Modern Genetics A Pedigree A pedigree is a chart or “family tree” that tracks which members of a family have a particular trait.

4. Chapter 6 Modern Genetics Pedigree Activity Click the Active Art button to open a browser window and access Active Art about pedigrees.

5. Chapter 6 Modern Genetics A Hemophilia Pedigree The pedigree shows the inheritance of hemophilia, a sex- linked disorder in a family.