1. Get out your SpongeBob HW!!!
Admit Slip
2/23/15
Get out your SpongeBob HW!!!
In chinchillas, “standard” coat color (silver/grey) is dominant to “beige” coat color (light tan).
If you breed a male chinchilla with the genotype Ss to a female chinchilla with the genotype ss, what percent of their offspring will be standard colored?
Female: ss
Male: Ss
Offspring??
Date:
2/23/15
Topic:
Punnet Square Practice 1
Page # ___

2. Today in Room 315… ADMIT SLIP: Chinchilla problem
Date:
2/23/15
Topic:
Punnet Square Practice 1
Page # ___
Today in Room 315…
ADMIT SLIP: Chinchilla problem
HW: SpongeBob Genetics: Incomplete Dominance
CONTENT OBJ: SWBAT define and provide examples for incomplete dominance
LANG. OBJ: SWBAT write their own punnet square problem
ANNOUNCEMENTS: ASPEN sadness…
AGENDA:
Spongebob Review
PTC testing
Make your own Punnet sq problem
Incomplete dominance
EXIT SLIP: Begin SpongeBob HW

3. Did you get it all right? 
SpongeBob HW Review
How do you think it went??
Did you get it all right? 

4. PTC Testing Directions: Put the paper on your tongue.
How many people taste something? __________
How many people do not? __________
The ability to taste PTC is dominant (T)
The ability to not taste PTC is recessive (t)
Based on your taste, what might your genotype be?

6. PTC Punnet Square Who tastes it? (Has tasting allele = dominant)
Who does not? (Has non-tasting allele = recessive)
If the taster is heterozygous and they have children, what percentage of the children would have the non-tasting allele? (Complete a Punnet square)

7. If you come up with a good one, I can use it in future years!
Write your own…
You have 7 minutes to write your own Punnet square problem involving one trait.
Directions: 1) Write the problem on a separate sheet of paper 2) Complete the problem in your journal (aka create an answer key) 3) Find a partner and switch problems to complete 4) Check your answers with each other

8. If you come up with a good one, I can use it in future years!
Example Problems
Ex 1) Lions can have thick manes or thin manes. Thick mane (T) is dominant to a thin mane (t). The following parents breed: father = TT mother = Tt. What percent of their children will have a thick mane?
Ex 2) Maria is heterozygous for brown eyes. If brown is dominant to blue, what were the possible genotypes of her parents?

9. Switch!
Solve each others problems, then check your answers with your partner. Did you both reach the same conclusion?

10. Rate your confidence Rate yourself from 1-5 by holding up fingers
5 being “I GOT THIS!” and 1 being “Whaaaa?”

11. Review
Dominant?
Recessive?
There’s some other options…

12. Incomplete Dominance*
One allele is not completely dominant over another, resulting in an “intermediate” (blend between the two) during a heterozygous condition
Think… Can you make sense of it?

13. Snapdragons = type of flower 
Incomplete Dominance
Explain in your own words.
What happens if you breed two pink flowers together? (Do the punnet square)
Snapdragons = type of flower 

14. Breed pink w/ pink? What percentage of each color will you get?
25% Red
50 % Pink
25% White

15. What are the genotypes of these children?
Practice Problems
Curly hair (C) is dominant to straight hair, but wavy hair results from incomplete dominance.
What are the genotypes of these children?

16. Practice Problems
If hazel eyes result from incomplete dominance between brown (BB) and green (GG), what would the genotype of this child be? BG
Note: The genotype for incomplete dominance could include one big and one small or two different letters
Ex. Rr = pink in plants Ex. BG = hazel in eyes

17. Finished sheet due tomorrow!
HW: SpongeBob Part 3
Incomplete Dominance
Finished sheet due tomorrow!
Begin now

18. Punnet Sq Games
s/FurryFamily.swf
Later Review (includes sex linked):
Teacher notes only