November 1-5

November 1-5
Dear Students:
This week we will have a test Wednesday, November 03. Remember this test will only include Problems involving:
• Sex-linked traits
• Pedigree charts
• Dihybrid crosses
Your chapter content test will be until next week. For that one you will study the entire chapter content as well as Key Terms.


Helpful Review on Pedigree Analysis
A pedigree is a diagram of family relationships that uses symbols to represent people and lines to represent genetic relationships. These diagrams make it easier to visualize relationships within families, particularly large extended families. Pedigrees are often used to determine the mode of inheritance (dominant, recessive, etc.) of genetic diseases. A sample pedigree is below.

In a pedigree, squares represent males and circles represent females. Horizontal lines connecting a male and female represent mating. Vertical lines extending downward from a couple represent their children. Subsequent generations are therefore written underneath the parental generations and the oldest individuals are found at the top of the pedigree.
If the purpose of a pedigree is to analyze the pattern of inheritance of a particular trait, it is customary to shade in the symbol of all individuals that possess this trait.
In the pedigree above, the grandparents had two children, a son and a daughter. The son had the trait in question. One of his four children also had the trait.


Use the following link to practice:
GENETICS websites
http://www.svusd.k12.ca.us/schools/lhhs/mccormacks/apbiowebpage/Assignments/genetics%20wkst.pdf
http://biology.clc.uc.edu/courses/bio105/geneprob.htm

1. Punnett Square examples: Complete MONOHYBRID crosses (That means tracking one trait at a time). We will not be doing Dihybrid crosses in class (that means tracking 2 traits on one large punnett square.)

2. Practice Quiz with answers….just for fun!

3. Practicing Punnett Squares

4. Vocabulary Practice (some of the words here we did not use, but you can ignore those and use the ones we did review.)

5. Genetics Practice Problems. Find out how 2 hearing dogs can produce a deaf dog and others. This site also shows dihybrid crosses (which will not be done in class)

6. Interactive Game with punnett Squares