1. 3-3e. Pedigrees
Chapter 7.4

2. Human genetics follows the patterns seen in other organisms.
We can use phenotypes in one family to determine their genotypes and mode of inheritance
We use pedigrees to do this
(not the dog food)
Basically it’s a family tree

3. How to read/draw a pedigree…..
Girls =
Boys =
Shaded in is the trait we are following
Homer
Marge
Lisa
Maggie
Bart

4. If the phenotype is more common in males, the gene is likely sex-linked.
How do you use a pedigree to determine mode of inheritance?
Guess and Check