MonsteMonster Genetics 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:
Flip a coin (you can use this site: https://justflipacoin. com/) 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 her genotype.)
Determine the phenotype resulting from the allele pair for each trait.
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 (Head) Allele 2 (Tail) 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
(regulatory gene) 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
(regulatory) No ears (N) Two ears (n)
Claws
Long (L) Short (l)
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.

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
(regulatory) No tail
Teeth Round
Feet
(incomplete) FF’
Horn Color ww
Ear shape yy
Ears (regulatory) Have 2 ears
Claws Short

Use Punnett squares to predict what traits would result from a cross between the two monsters for each trait, and answer the following questions:

Eyes – What percent of offspring will have only one eye?

Father’s Genes
Mother’s Genes e e

Eye Color – What percent of offspring will have red eyes?
Father’s Genes
Mother’s Genes

Skin Color – What percent of offspring will have green skin?
Father’s Genes
Mother’s Genes

Tail – What percent of offspring will have a tail?
Father’s Genes
Mother’s Genes P p

Feet – What percent of offspring will have three toes?
Father’s Genes
Mother’s Genes F F’

Horn Color – What percent of offspring will have purple horns?
Father’s Genes
Mother’s Genes w w

Ears – What percent of offspring will have ears?
Father’s Genes
Mother’s Genes

Claws – What percent of offspring will have long claws?
Father’s Genes
Mother’s Genes

r Genetics Lab