1. Bell Work
• Study for the quiz! Look over your Interactive
notes (pg 12-13) and your
Incomplete/Codominance worksheet

2. Notes: Multiple Alleles (pg 14)

3. Notes: Multiple Alleles (pg 14)
• Multiple alleles = Traits controlled by more
than two alleles

4. Example: Rabbits
• C = agouti (dark gray)

5. Example: Rabbits
• C = dark gray
• cch = chinchilla (light gray)

6. Example: Rabbits
• C = dark gray
• cch = chinchilla (light gray)
• ch = himalayan (white with black points)

7. Example: Rabbits
• C = dark gray
• cch = chinchilla (light gray)
• ch = himalayan (white with black points)
• c = white

8. Example: Rabbits
• C = dark gray
• cch = chinchilla (light gray)
• ch = himalayan (white with black points)
• c = white
• Dominance: C>cch>ch> c

9. Genotypes
• White: cc

10. Genotypes
• White: cc
• Himalayan: chch or chc

11. Genotypes
• White: cc
• Himalayan: chch or chc
• Chinchilla: cchcchor cchch or cchc

12. Genotypes
• White: cc
• Himalayan: chch or chc
• Chinchilla: cchcchor cchchor cchc
• Gray: CC or C cchor C chor Cc

13. Practice problem (pg 15)
• Draw the Punnett square and give the
phenotype ratios for the following cross:
C cchx chch

14. Output Activity (pg 15)
• Make up a multiple alleles problem that
requires a Punnett square to solve. You must
make up a NEW trait with 4 different alleles,
explain the phenotypes, and say which traits
are dominant to which.