1. Patterns of Inheritance

2. Historical Roots Ancient greeks –Hippocrates Pangenesis –Aristotle Potential for features, not actual particles of features themselves

3. Gregor Mendel Austrian Monk (1800’s) Mathematician Heritable factors Peas

5. Mendel’s Traits

6. Generations

7. Mendel’s 4 Theories Alternate forms of genes exist (Alleles) 2 genes per trait Gamete only carries one allele Dominance vs. Recessive

10. Independent Assortment

11. Testcross

12. Probability

13. Mendel Got Lucky Incomplete Dominance Multiple Alleles Pleiotropy Polygenic inheritance Linkage

14. Incomplete Dominance RRRrrr

15. Multiple Alleles

16. Pleiotropy

17. Polygenic Inheritance

18. Linkage Perturbs mendle’s ratios of dihybrid cross Genes located close together on chromosome Chromosomes determine sex in many species, not just humans Sex chromosomes carry some other genes –Sex linked –Some diseases have sex linkage component