1. Pedigree

2. Pedigree “genetic” family tree

3. Male Pedigree Symbols

4. Female Pedigree Symbols

5. Mating between individuals Pedigree Symbols

6. Mating between close relatives Pedigree Symbols

7. Offspring “line” Pedigree Symbols

8. Label generations (Roman Numerals) Pedigree Symbols I II

9. Label birth order (oldest  youngest) Pedigree Symbols I 1 2 II 1 2 3

10. Identical Twins Pedigree Symbols

11. Nonidentical (Fraternal) Twins Pedigree Symbols

12. Offspring of unknown sex Pedigree Symbols

13. Aborted or stillborn Pedigree Symbols

14. Deceased Pedigree Symbols

15. Affected individual Pedigree Symbols

16. Heterozygous individual Pedigree Symbols

17. X-linked carrier (remember: only woman can be X-linked carriers) Pedigree Symbols

18. Drawing a pedigree Draw a pedigree that shows three children (one older brother and two younger sisters). The mother is older than the father. The mother’s father is older but the father’s mother is older. The eldest daughter, the father’s father (grandfather), and the mother are afflicted with a recessive disorder.

19. Drawing a pedigree I 1 2 3 4 II 1 2 III 1 2 3

21. Afflicted Males More afflicted men than women

22. Afflicted Males “Equal” Afflicted Men and Women AfflictedFemales

23. Autosomal Dominant Parent with Trait

24. Autosomal Recessive SkipsGeneration Parent can exhibit trait

25. Autosomal

26. Sex-linked X-linked Dominant XAXA XAXa XaXa XAY XaY XaXa X-linked Recessive XAXA XAXa XAY XaY

27. Sex-linked Recessive

28. Autosomal Dominant

29. Autosomal Dominant

30. Sex-linked Recessive

31. Describe this family Autosomal Recessive

32. Label the genotypesAutosomal recessive Aa Aa aa Aa ? ? Aa aa aa aa Aa aa

33. Describe this family Sex-linked Dominant

34. Label the genotypesSex-linked Dominant XAY ? XaY XAXa ? XAY XaXa XAXa XAXa XAXa XAXa XaY XaY XaY