Genetics

Today we're going to keep looking at genetics in rpeparation for the next assignment.  Answer the following in your workbooks.

1. Make sure you have made some notes about each point in the post below this one. This will be good preparation for the assignment.
2. What is continuous variation?
3. Explain what discontinuous variation is, givng an example:
4. What causes Huntington disease? Describe the symptoms.
5. Is Huntington disease a dominant or recessive condition?
6. What is co-dominance? Give an example of a characteristic that shows co-dominance:
7. What are sex-linked characteristics? Why do they affect males more often?
8. Briefly describe what Haemophilia is:
9. Using the haemophilia pedigree below, explain what a carrier is: 
10. Is haemophilia a dominant or recessive trait? How can you tell?
11. Watch this short video on Huntington disease.  What issues might people have with getting tested for the condition?

Extension - Explain what the Hardy Weinberg principle is, and explain what the criteria are a population must meet to be in Hadry Weinberg equilibrium.