1. Punnett Review & Pedigree Charts
Table of contents:
Spongebob Genetics
Pedigree Charts
Muggle vs. Magic

2. Punnett Review
Spongebob Genetics

3. Pedigree Charts

4. Learning Targets
I can interpret pedigree charts to analyze inherited family traits or genetic diseases.

5. What is a pedigree chart?
Pedigree charts are used to show records of families or individuals.
They are used because breeding humans is not possible. Shows ethical ways of studying human genetics.
Shows how possible conditions may be inherited.
Symbols are represent the individuals and their relationships to each other

6. Please copy down the various symbols that are used.

7. The blank triangle and square
Shade in half of the blank triangle and square next to the completely shaded in shapes.
The half shaded in square and triangle show they are heterozygous and are considered carriers.

8. The half filled circles and squares show the carriers of the disorder

9. Here we see a family with 5 children.
The pedigree chart shows that the second son is affected by the condition.

10. Below is a pedigree of 4 generations – 20 people.
Generations are identified by Roman numerals.

11. Confused still? Maybe this will help!

12. What is Hemophilia?
Hemophilia is a condition when blood can't clot properly, excessive bleeding (external and internal) occurs after any injury or damage.
Symptoms include many large or deep bruises, joint pain and swelling, unexplained bleeding, and blood in urine or stool.

13. Hemophilia
The X and Y chromosomes are called sex chromosomes. The gene for hemophilia is carried on the X chromosome. Hemophilia is inherited in an X-linked recessive manner.

15. Complete the pedigree chart in your notes.

16. Take 5 minutes to complete the practice notes below.

18. Muggle or Magic? Task to Complete:
Complete the Harry Potter pedigree practice
Complete exit ticket
Turn both in 

20. Extra Pedigree Practice

21. Is the condition Sex linked or not?

22. Study the following pedigree chart. How is this disorder inherited
Study the following pedigree chart. How is this disorder inherited? Write in the genotypes for each individual.

23. Study the following pedigree chart. How is this disorder inherited
Study the following pedigree chart. How is this disorder inherited? Write in the genotypes for each individual.

24. Study the following pedigree chart. How is this disorder inherited
Study the following pedigree chart. How is this disorder inherited? Write in the genotypes for each individual

25. Is the trait dominant or recessive?

26. Is the trait dominant or recessive? Who are the possible carriers?