Download Incomplete and Co-Dominance Review Worksheet

Incomplete and Co-Dominance Review Worksheet
1. Oompahs 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. Show a "key" for the genotypes and
phenotypes of hair color.
Key:
_______ = Red
_______ = Blue
_______ = Purple
2. Orville Oompah has purple hair and is married to Opal
Oompah who brags that she has the bluest blue hair in
the valley. How many of Opal’s children will be able to
brag about their blue hair also? __ How many will take
after their father? ____ (Show work!)
5. Olivia Oompah is married to Odo Oompah. Both of them have
purple hair. They have 100 children. What is the hair color of
their children and in what proportion? Red ________ Blue
______ Purple ________(Show work!)
6. In the land of Oompah, blue hair is highly valued. Blue
haired Oompahs get special benefits. Oscar Oompah 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?
__________ If he can’t find this type of Oompah what
should be his second choice? _____________(Show work!)
1. In humans, wavy hair (CS) results by the co-dominant
situation of curly hair (C) and straight hair (S). What are
the possible results if a curly-haired man and wavy-haired
woman have children.
3. One of Opal's children is born with shocking red hair. Is
Orville Oompah the father of this child? ______ 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?
___________(Show work!)
4. Olga Oompah has red hair and marries Oliver Oompah
who has blue hair. They have 32 children. What is the
color of these children's hair? ____________(Show work!)
2. In iris, purple (p) is incompletely dominant over white (w).
What would be the results of a cross if both parents were
pale lavender (heterozygous-pw)?
3. In crocus flowers, white (W) and purple (P) colors are codominant, and result in a purple and white striped flower
when both genes are present. What are the possible
results from the cross-pollination of a striped crocus with
a white crocus?
4. In cattle, red (r) is incompletely dominant over white (w)
hides. Roan in the name of the color that results from
incomplete dominance. What are the possible results if a
white male mates with a roan female?
Spongebob loves growing flowers for his pal Sandy. Her
favorite flowers, Poofkins, are found in red, blue, and purple.
Use the information provided and your knowledge of
incomplete dominance to complete the sections below.
1. Write the correct genotype for each color if R represents a
red gene and B represents a blue gene
Red: ______
Blue: ______
Purple: ______
2. What would happen if Spongebob crossed a red Poofkin
with a blue Poofkin? Complete the punnett square to
determine the chances of each flower color.
a. Give the genotypes for the offspring:
b. Give the phenotypes for the offspring:
c. How many of the plants would have red
flowers? ______%
d. How many of the plants would have purple
flowers? ______%
e. How many of the plants would have blue
flowers? ______%
3. What would happen if Spongebob crossed two purple
Poofkins? Complete the punnett square to determine the
chances of each flower color.
a. Give the genotypes for the offspring:
b. Give the phenotypes for the offspring:
c. How many of the plants would have red
flowers? ______%
d. How many of the plants would have purple
flowers? ______%
e. How many of the plants would have blue
flowers? ______%
4. What would happen if Spongebob crossed a purple
Poofkin with a blue Poofkin? Complete the punnett
square to determine the chances of each flower color.
a. Give the genotypes for the offspring:
b. Give the phenotypes for the offspring:
c. If Spongebob planted 100 seeds from this
cross, how many should he expect to
have of each color:
Purple ______ Blue ______ Red _____
Spongebob and his pal Patrick love to go jellyfishing at
Jellyfish Fields. The fields are home to a special type of
green jellyfish known as Goobers and only really great
jellyfishermen are lucky enough to catch some on every trip.
Many of the jellyfish are yellow (YY) or blue (BB), but some
end up green as a result of incomplete dominance. Use this
information to help you complete the following situations.
1. What would happen if Spongebob and Patrick crossed
two “goobers” or green jellyfish? Complete the Punnett
square to help you determine the probability for each
color of jellyfish.
a. Give the possible genotypes for the
offspring.
b. Give the possible phenotypes for the
offspring.
c. What % of offspring would be yellow? ____%
d. What % of offspring would be blue? ____%
e. What % of offspring would be green? ____%
2. What would happen if they crossed a yellow jellyfish with
a goober? Complete the Punnett square to help you
determine the probability for each color of jellyfish.
a.
b.
c.
d.
e.
Give the possible genotypes for the offspring.
Give the possible phenotypes for the offspring.
What % of offspring would be yellow? _____%
What % of offspring would be blue? _____%
What % of offspring would be green? _____%