Name: ______

Monster GeneticsLab

There are many different patterns or modes of inheritance. Some are simple dominantorrecessive, as in Mendelian traits. Some are more complex, such as incomplete dominantorcodominant traits. In this lab you will investigate how a combination of these genesworktogether to create anorganism.

Part 1Procedure:

1. Flip a coin twice to determine the genotype for each trait and record it in the datatable.Heads = allele 1, Tails = allele 2 (Example: if you flipped heads twice, yourmonster will have two copies of allele 1 for hisgenotype.)

2. Determine the phenotype resulting from the allele pair for eachtrait.

3.Repeat steps 1‐2 for each trait and complete the female monster’s Table1.

Table 1: Genotypes & Phenotypes for FemaleMonster

Trait / Allele1 / Allele2 / Genotype / Phenotype
Head shape / Triangular(T) / Round (t)
Eye / Two small eyes(E) / One large eye(e)
EyeColor(incomplete) / Red(R) / White(R’)
Body Shape / Oval (O) / Square (o)
SkinColor(codominant) / Green(G) / Blue (B)
TailShape / Curly(C) / Straight(c)
TailColor / Purple(P) / Orange(p)
Tail
(regulatorygene) / Have tail(H) / No tail(h)
Teeth / Sharp (S) / Round(s)
Feet(incomplete) / Four toes(F) / Two toes(F’)
HornColor / Purple(W) / White (w)
Earshape / Pointy(Y) / Round(y)
Ears(regulatory) / No ears(N) / Two ears(n)
Claws / Long(L) / Short(l)
Hair Color / AABB=Black AaBB=DarkBrown aaBB=Yellow AABb=Black AaBb=LightBrown aaBb=YellowAAbb=Red Aabb=Orange aabb=Grey(you will need to flip the penny twice, once for A/aallele and once for B/b allele)

Name: ______

Concluding Questions:

  1. Why is the coin flip used to represent the selection of alleles?
  1. What is an example of a heterozygous combination?
  1. What is an example of a homozygous recessive combination?
  1. What is an example of a homozygous dominant combination?
  1. Explain the following modes of inheritance:

A.Mendelian Dominance

1.Description:

2.How are the allele combinations expressed?:

3.Give an example of a trait from this lab that follows this mode of inheritance:

B.Co - Dominance

1.Description:

2.How are the allele combinations expressed?:

3.Give an example of a trait from this lab that follows this mode of inheritance

C.Incomplete Dominance

1.Description:

2.How are the allele combinations expressed?:

3.Give two examples of traits from this lab that follows this mode of inheritance

  1. What is the mode of inheritance expressed in hair color?

Illustrate your Monster Baby: