Download OOMPA LOOMPA GENETICS

OOMPA LOOMPA GENETICS
Oompas generally have gray faces, which is caused by a
dominant gene. The recessive condition results in an
orange face. The code for the dominant allele is “G”
while the recessive allele is “g”.
1.
An Oompa Loompa has a gray face and has “Gg” for its alleles.
a.
What is its phenotype?
b. What is its genotype?
c.
Is it homozygous recessive, homozygous dominant or heterozygous?
2. Fill in the chart.
Genotype
Phenotype
Heterozygous (y/n)?
Homozygous Dominant (y/n)?
Homozygous Recessive(y/n)?
GG
gg
Gg
3. Two heterozygous Oompa are crossed. What proportion of the offspring should have orange faces?
4. A homozygous dominant Oompa is married to an orange faced Oompa. They have 4 Oompa children. How
many of those children should have gray faces?
5. Odie Oompa has a gray face. In fact everyone in Odie’s family has a gray face and the family likes to brag
that they are a “pure” line. Much to his family’s horror, Odie married Ondi Oompa, who *gasp* has an
orange face.
a.
What will be the phenotypes of their children? ________
b. What are the genotypes of the children? __________
6. Opa Oompa, who is heterozygous, marries Otto. Otto has an orange face. What is the probability that Opa
and Otto's children will have an orange face?
7. TEST CROSS: Otis Oompa has an orange face and is married to Ona Oompa who has a gray face. They have
60 Oompa children. 30 of those children have orange faces. What is Ona Oompa's genotype? Try both
possible genotypes (GG and Gg) if you need to.
Oompas can have red, blue, or purple hair. The allele that controls this trait is INCOMPLETELY
DOMINANT, where purple hair is caused by the heterozygous condition.
o
Red hair is “RR” and Blue hair is “BB”
8. What is the genotype for purple hair?
9. Orville Oompa has purple hair and is married to Opal Oompa who brags that she has the bluest blue hair in
the valley.
a.
How many of Opal’s children will be able to brag about their blue hair also?
b. How many will take after their father?
10. One of Opal's children is born with shocking red hair. Is Orville Oompa the father of this child?
11. But wait, Opal swears that she has been faithful, she claims the hospital goofed and got her baby mixed
with someone else's. Is Opal the mother of the red haired child?
12. Olga Oompa has red hair and marries Oliver Oompa who has blue hair. They have 32 children. What is the
color of all these children's hair?
13. Olivia Oompa is married to Odo Oompa. Both of them have purple hair. They have 100 children. What is the
hair color of their children and in what proportion?
a.
Red ________ Blue ______ Purple ________
14. Oscar Oompa has purple hair but he wants a wife that will give him children with blue hair. What color hair
should he look for in a wife?
15. If he can’t find this type of Oompa what should be his second choice?
DIHYBRID CROSS
16. A heterozygous gray-faced, purple-haired Oompa named Ortimer marries an orange-faced, red-haired
Oompa named Odette. What will Ortimer and Odette’s children look like?
HINT: GgBR x GgRR
___/16 will be gray-faced, purple-haired
____/16 will be orange-faced, purple-haired
___/16 will be gray-faced, red-haired
____/16 will be orange-faced, red-haired
___/16 will be gray-faced, blue-haired
____/16 will be orange-faced, blue-haired