1. Pedigrees

2. Pedigree charts Show a record of the family of an individual.
Can be used to study the transmission of a hereditary condition.
Particularly useful when there are large families and a good family record over several generations.

3. Symbols used in pedigree charts
Squares = Males
Circle = Females

4. A- can be either AA or Aa But have same phenotype.
A Recessive Trait
A- can be either AA or Aa But have same phenotype.

5. Color Blindness X-linked Trait
Some times a half shaded circle or square is used to represent a carrier of a recessive gene

6. Draw a Pedigree of a color blind woman
What would her parents have to be?

7. Draw a Pedigree of a color blind woman
What would her parents have to be?
Dad = Color Blind
Mom= would have to had a color blind dad