1. Patterns & Probability of Inheritance
Mrs. Anna Ward
Ridge Road MS

2. Do Now!!!! The cell _________________ protects the plant cell.
Cells are the smallest unit of _________________.
__________________ organisms are made up of only one cell.

3. Announcements
Great job today!!!!!

4. How to interpret the information from a Pedigree
Females are indicated with a circle, and males are indicated with a square.
= FEMALE
= MALE

5. How to interpret the information from a Pedigree
A straight, horizontal line connecting a female and a male indicates that the two are married, and/or produced children.

6. How to interpret the information from a Pedigree
A slash across a shape indicates the person is deceased. (DEAD)

7. How to interpret the information from a Pedigree
A straight, vertical line connected to the vertical line above indicates the children produced by that union.

8. How to interpret the information from a Pedigree
If more than one child is birthed, then the children are placed in BIRTH ORDER along a vertical Line.

9. How to interpret the information from a Pedigree
Shapes may be shaded or clear.
Shaded = Has trait/disease
Unshaded = Does not
Occasionally you may also see a
partially shaded shape, or a
shape with a dot. This indicates
the person is a “Carrier” of the
disease (is heterozygous for the
trait, but the dominant allele
overrides the recessive disease
trait.

10. Cheat Sheet for Pedigrees….
(Write this down if you have not done so previously…)
SQUARE—MAN
CIRCLE—WOMAN
SHADED—DISEASE/TRAIT
CLEAR—NO DISEASE/TRAIT
Line directly connecting circle/square—Had child (married)
Line off of that marriage—Children
Each row is a generation

11. CFU: How many females are represented? How many males?
How many people have the disease?
How many are males with the disease?
How many are females with the disease?
How many generations are represented?
How many marriages do you see?
How many children did the couple in the first generation have?

12. CFU: How many females? How many males?
How many people have the disease?
How many are males with the disease?
How many are females with the disease?
How many generations are represented?
How many marriages do you see?
How many children did the couple in the first generation have?