Alien Punnett squares
Cute little friendly aliens have landed on
Earth. Help scientists figure out their
genetics by completing the Punnett squares
and answering the questions.
Beebu, beebu.
That’s “thank you” in alien speak.
Alien Punnett Squares
1.
h
h
2.
H
h
h
h
H = two horns h = one horn
H
H
Alien Punnett Squares
1a, What trait is being traced in this
Punnett square?
1b. Which is dominant and which is
recessive? How do you know?
2a. What are the parents genotypes?
2b. What are the parents phenotypes?
1c. What are the parents phenotypes?
.2c. What percentage of the offspring
would have two horns?
1d. How many offspring are one horn
phenotype?
What would their genotype(s) be?
Alien Punnett Squares
3.
t
t
4.
t
T
t
t
T
T = long tongue t = short tongue
T
Alien Punnett Squares
3a.. What are the parents phenotypes?
4a. Do any of the parents have a long
tongue? If so, what is their genotype?
3b. What are the offspring genotypes?
4b. What percentage of offspring have a
short tongue? What is their genotype(s)?
3c. What percentage show the recessive
trait?
Alien Punnett Squares
5.
L
l
6.
L
LL
LL
l
Li
Li
L = long body l = short body
Alien Punnett Squares
5a., What trait is being traced in this
Punnett square?
6 .Complete the cross by determining the
PARENT genotypes based on the offspring.
5b. List all the offspring genotypes and the
matching phenotypes.
6a. What are the parents genotypes?
6b. What are the parents phenotypes?
5c. What percentage of offspring have long
bodies
.