PUNNETT SQUARE Webquest Name ______

Date ______Period ______

PART I

VOCABULARY TO KNOW: http://www.kumc.edu/gec/glossnew.html

1) Allele-

2) Recessive-

3) Dominant-

4) Codominance-

5) Incomplete dominance-

6) Genotype-

7) Phenotype-

http://www2.edc.org/weblabs/IncompleteDom/incompletedominance.html

To perform the following activities that teach about Dominance, Incomplete Dominance and Codominance. Then, answer the questions below in complete sentences.

8. What are the alleles for purple flowers?

9. What are the alleles for white flowers?

10. What is the phenotype of the following allele combinations (genotypes)?

a) PP = b) Pp = c) pp =

11. What kind of inheritance pattern can be observed? Explain your reasoning

12. What are the alleles for red flowers?

13. What are the allele for white flowers?

14. What are the alleles for pink flowers?

15. Why is there a third phenotype in this example? What happened?

16. What happened when you crossed a spotted-seed plant with a dotted-seed plant?

17. Did it follow any of Mendel’s laws? Why or Why not?

18. Which pattern of inheritance are you observing? Explain

19. What determines human blood-type?

20. Explain the pattern of inheritance observed with human blood type?

21. What happens when a white rabbit is crossed with a brown rabbit?

22. How did you know what answer to pick?

23. What happens when a brown-coat horse is crossed with a cream-coat horse?

24. What happened? How is this explained?

25. Which examples show the same pattern of inheritance?

26. What is the difference between alleles that show dominance, incomplete dominance and codominance?

PART II

VOCABULARY TO KNOW: http://www.kumc.edu/gec/glossnew.html

1) Homozygous-

2) Heterozygous-

3) Genotype-

4) Phenotype-

5) Carrier

Go to http://www2.edc.org/weblabs/Punnett/punnettsquares.html to perform the following activities using Punnett Squares. Read each page carefully. Answer the following questions as you go along.

6. What percentage would you expect to be BROWN CHICKS?

7. What percentage would be HYBRID BROWN?

8. What percentage of the lemmings would be carriers (hybrid)?

9. How many of the four offspring lemmings would be albino?

10. What is the genotype of the albino offspring? ______

11. Write down the genotypes for the lemming traits of…

a) Long tail= b) Short tail =

c) Brown = d) Albino =

12. Which two lemmings created the albino baby?

a) What are their numbers? and

b) What are their genotypes? and

13. What does it mean when an organism is a carrier?

PART III. Genetics and Heredity Webquest

Ø  There are 3 websites listed here.

Ø  For each link, there are questions and directions below.

Link #1 – Virtual Genetics Punnett Squares: http://www.mhhe.com/biosci/genbio/virtual_labs/BL_05/BL_05.html

Read through Objectives and Instructions on the left side of the screen. It’s very important that you read these before beginning.

1. What are the objectives for this lab?

2. What are you going to do?

Click on the TV for a review of how Punnett squares work.

3. Based on the video’s information, how do Punnett squares work?

Click on the notebook on the table to complete genetics crosses. After you complete each cross, record your results in the data table below. Hit Reset for the next problem in the set.

4. There are 10 problems total you need to do 5.

Scenario Number / Genotype of Parent 1 / Genotype of Parent 2 / % Homozygous and Heterozygous / % Phenotype

Link #2 – Punnett Squares http://www2.edc.org/weblabs/Punnett/punnettsquares.html

5. Read the description of the problem and the review of the Punnett square.

6. Click continue to get your first question. The answer is:

7. Fill in the lemming Punnett square on the screen and on your paper:

8. Answer the question about albino gene carriers. The answer is

9. Which two lemmings will you choose to cross? X

10. Show the Punnett square for this cross on your paper on the screen:

11. What does a Punnett square allows us to do in Genetics?

Link #3 – Inheritance Practice Quiz: http://anthro.palomar.edu/practice/mendqui2.htm

12. Answer each question. Record the correct answer, an explanation and your work using the table given below:

Question / Answer / Explanation
1
2
3
4
5
6

13. What did you like about each of the activities?

14. Which activity was the most challenging? Explain how you overcame this challenge?

15. If you had a chance, how would you change how the activities worksheet was designed? (I can’t control the websites content – which I like very much!)

5 | Page