This lab activity reviews your understanding of the basic Mendelian genetics principals we covered in lecture last week. Download the attached file, complete the activities, fill in the tables and provide answers to the questions. As I state on the document, you do NOT need to provide your Punnett squares unless you want me to review them (which I would be glad to do if you are confused by the assignment).
Johnson State College, Biol1210: Intro to Biology
Monster Genetics Lab
(adapted from https://www.nlm.nih.gov/exhibition/harrypottersworld/pdf/teachersmonstergeneticslab.pdf)
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 works to create an organism.
Part 1 Procedure:
In the table below, for each trait two potential alleles are described. Most use simple dominant/recessive type inheritance but some are specified as being controlled by incomplete dominance or codominance. Remember, incomplete dominance leads to an intermediate phenotype in heterozygous individuals and co-dominance means both traits are expressed in a heterozygous individual.
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. Remember to take into consideration incomplete and codominance!
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 (incomplete)
Red (R)
White (R’)
Skin Color (codominant)
Green (G)
Blue (B)
Tail Shape
Curly (C)
Straight (c)
Tail Color
Purple (P)
Orange (p)
Tail
Have tail (T)
No tail (t)
Teeth
Sharp (S)
Round (s)
Feet (incomplete)
Four toes (F)
Two toes (F’)
Horn Color
Purple (W)
White (w)
Ear shape
Pointy (Y)
Round (y)
Ears
No ears (N)
Two ears (n)
Claws
Long (L)
Short (l)
Part 2 Procedure:
The female monster that you created in part 1 and a male monster (see Table 2 below) plan to have baby monsters. They are interested in finding out for each trait the probability that their offspring will have that trait.
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 (incomplete)
White
Skin Color (codominant)
Green
Tail Shape
Straight
Tail Color
Pp
Tail
No tail
Teeth
Round
Feet (incomplete)
FF’
Horn Color
ww
Ear shape
yy
Ears
Have 2 ears
Claws
Short
2. Using the information you have about the genotype for the female and male monster for each trait, create Punnett squares* to predict what traits would result from a cross
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