1. Bell Work (pg 14)
• Solve the multiple allele problem that your
neighbor made up yesterday

2. Notes: Blood Types (pg 15)

3. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)

4. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)
Blood Type Surface Genotypes
Molecules
A
B
AB
O

5. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)
Blood Type Surface Genotypes
Molecules
A A IAIA Or IAi
B
AB
O

6. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)
Blood Type Surface Genotypes
Molecules
A A IAIA Or IAi
B B IBIB or IBi
AB
O

7. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)
Blood Type Surface Genotypes
Molecules
A A IAIA Or IAi
B B IBIB or IBi
AB Both A and B IA IB
O

8. Notes: Blood Types (pg 15)
• Humans have 4 blood types: A (IA), B (IB), AB
(IA IB), and O (i)
Blood Type Surface Genotypes
Molecules
A A IAIA Or IAi
B B IBIB or IBi
AB Both A and B IA IB
O None ii

9. Example
• Cross IAi with IA IB
IA i
IA
IB

10. Example
• Cross IAi with IA IB
IA i
IAIA IAi
IA
IB
IAIB IBi

11. Example
• Cross IAi with IA IB
IA i
IAIA IAi 50% Type A
IA 25% Type AB
25% Type B
IB
IAIB IBi

12. Practice Problem (pg 14)
• Mrs. Stewart has type B blood. Her mom has
type A and her dad type B.
A. What must her mom’s genotype be?
B. What are her dad’s two possible genotypes?
C. Draw both possible Punnett squares