Date: ___________
Page | 1
Monster Genetics Lab
[Note: The two lab activities allow students to apply their knowledge of the simple and complex genetic traits. Students demonstrate how they are able to apply and synthesize what they have learned in a fun activity. If possible allow students to illustrate both parent and child monsters based on the genetic information identified for all three monsters during the lab.]
You have learned about many different patterns of inheritance. Some are simple dominant or recessive, as in Mendelian traits. Some are more complex, such as incomplete dominant or codominant traits. In this lab you will investigate how a combination of these genes work together to create an organism.
Part 1 Procedure:
1. Flip a coin twice to determine the genotype for each trait and record it in the data table.
Heads = allele 1, Tails = allele 2 (Example: if you flipped heads twice, your monster will have two copies of allele 1 for his genotype.)
2. Determine the phenotype resulting from the allele pair for each trait.
3. Repeat steps 1‐2 for each trait and complete the female monster’s Table 1.
Table 1: Genotypes & Phenotypes for Female Monster
Trait Allele 1 Allele 2 Genotype Phenotype Eye Two small eyes (E) One large eye (e)
Eye Color Red (R) White (R’) (incomplete) Skin Color Green (G) Blue (B) (codominant) Tail Shape Curly (C) Straight (c)
Tail Color Purple (P) Orange (p) Tail Have tail (T) No tail (t) (regulatory gene) Teeth Sharp (S) Round (s) Feet Four toes (F) Two toes (F’) (incomplete) Horn Color Purple (W) White (w)
Ear shape Pointy (Y) Round (y) Ears No ears (N) Two ears (n) (regulatory) Claws Long (L) Short (l)
Name ____________________________ Date: ___________
Class Period Page | 2
Part 2 Procedure:
The female monster (described in Table 1) is married to a male monster (see Table 2 below) and they plan to have baby monsters. They are interested in finding out the probabilities of which traits their offspring will have.
1. Fill in the missing genetic information in the table for the male.
Table 2: Genotypes & Phenotypes for Male Monster
Trait Genotype Phenotype Eyes ee Eye Color White (incomplete) Skin Color Green (codominant) Tail Shape Straight Tail Color Pp Tail No tail (regulatory) Teeth Round Feet FF’ (incomplete) Horn Color ww Ear shape yy Ears Have 2 ears (regulatory) Claws Short
2. Create Punnett squares (attach your work to this handout) to predict what traits would result from a cross between the two monsters for each trait, and answer the following questions:
a. Eyes – What percent of offspring will have only one eye? _________
b. Eye Color – What percent of offspring will have red eyes? _________ c. Skin Color – What percent of offspring will have green skin? _________ d. Tail – What percent of offspring will have a tail? _________ e. Feet – What percent of offspring will have three toes? _________ f. Horn Color – What percent of offspring will have purple horns? _________ g. Ears – What percent of offspring will have ears? _________ h. Claws – What percent of offspring will have long claws? _________
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