1. Honors Biology 8.6

2.  If your baby were going to get Huntington’s disease?

3.  We must analyze the past!  Geneticists analyze family history to predict the future appearance of a trait.

4.  Show relationships within a family  Track traits or disease in a family

6.  Marriage or Mating  Siblings

7.  Roman Numerals represent generations I II III

9.  We can determine if a trait is :  Autosomal or sex-linked  Autosomal disorders – chromosomes 1-22  Affects males and females equally  Sex-linked disorders – chromosome 23  Males more frequently affected  Dominant or recessive  Dominant  If a parent has it, a child usually does too, doesn’t usually skip generations  Recessive  Can show up in a child whose parents did not have it, can skip generations

10.  Dominant or Recessive?

11. Aa aa

12.  Dominant or Recessive?

13. Aa aa Aa aa

14.  Dominant or Recessive?

16.  Autosomal or sex-linked?  Dominant or recessive?

17.  Autosomal or sex-linked?  Dominant or recessive?

18.  Pedigrees are family trees that explain your genetic history.  Pedigrees are used to find out the probability of a child having a certain trait in a particular family.

19.  Making a basic pedigree:  http://study.com/academy/lesson/pedigree- analysis-in-human-genetics-tutorial.html http://study.com/academy/lesson/pedigree- analysis-in-human-genetics-tutorial.html  How to analyze a pedigree:  http://study.com/academy/lesson/pedigree- analysis-in-human-genetics-inheritance- patterns.html http://study.com/academy/lesson/pedigree- analysis-in-human-genetics-inheritance- patterns.html