Name:________________________________        Date:______        Hr:______

Incomplete Dominance

Purpose:

In this activity you will observe the probably color types produced by crossing two pink plants with the genotype RW.

Materials:

Procedure:

  1. Get two coins from your teacher.
  2. Heads will represent a capital letter “R.”
  3. Tails will represent a lowercase letter “w.”
  4. Toss both coins 50 times. Record the genotype of each toss into the table below each time you flip the coins.
  5. Answer the questions after you are done completing the data table.

Data Table:

Toss

Genotype

Toss

Genotype

Toss

Genotype

1

18

35

2

19

36

3

20

37

4

21

38

5

22

39

6

23

40

7

24

41

8

25

42

9

26

43

10

27

44

11

28

45

12

29

46

13

30

47

14

31

48

15

32

49

16

33

50

17

34

Questions:

  1. What are all of the possible genotypes?

  1. What is the percentage occurrence for each genotype?

  1. What is the percentage occurrence for each phenotype?

  1. Fill in the following Punnett square to show the probably results of this cross. Write the phenotypes next to each genotype.

Creative Commons LicenseUnit 5 Genetics and Heredity, Mitosis Project by MN Partnership for Collaborative Curriculum is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.