Pedigrees

1. Pedigrees Tracking Traits

2. Pedigrees Mr. Drivas and Mr. Kitchen

3. Pedigrees Punnet’s Squares -purpose? • Used to determine the probability of obtaining offspring of a given genotype/phenotype • Constructed using the genotypes of Mr. Drivas and Mr. Kitchen

4. Pedigrees Pedigree – purpose? • Used to track a given trait through a family’s history • Depends on information obtained about related individuals Mr. Drivas and Mr. Kitchen

5. Punnet’s Square Probabilities associated with offspring of certain genotype/phenotype Hypothetical - probability Future – unborn Pedigree Tracking of the Inheritance of a trait throughout the history of a family Real history Past – alive or once alive Pedigrees Differences Mr. Drivas and Mr. Kitchen

6. Pedigrees • Male • Female • Individual with trait • Carrier of trait (recessive) Mr. Drivas and Mr. Kitchen

7. Pedigrees • Dead Individual • Fraternal Twins • Identical Twins Mr. Drivas and Mr. Kitchen

8. I 1 2 II 1 2 Pedigrees • Horizontal lines • Mating • Vertical lines • Separate generations • Roman numerals • Generation number • Numbers • Individuals within generations Mr. Drivas and Mr. Kitchen

9. Pedigrees Dominant Mr. Drivas and Mr. Kitchen

10. Pedigrees Recessive Mr. Drivas and Mr. Kitchen