Download Punnett Square Pre-test

Name: ______________________________________
Pd: __________
Date:________
Punnett Square Pre-test
Directions: Match each definition with the word it belongs with. Place the letter on the line.
1.
2.
3.
4.
5.
6.
7.
8.
____ Heterozygous
____ Homozygous
____ Purebred
____ Hybrid
____ Punnett Square
____ Probability
____ Phenotype
____ Genotype
a. A graphic used to predict the results of a genetic cross
b. An organism’s physical appearance, or visible trait
c. Having two different alleles for a trait (Tt)
d. The offspring of generations that have the same traits
e. Having two identical alleles for a trait (TT or tt)
f. A number that describes how likely it is that an event will occur
g. An organism’s genetic makeup, or allele combinations
h. The offspring of generations that have two different alleles for a trait
9. In humans, being able to roll your tongue (R) is dominant over not being able to (r). A man who can roll
his tongue marries a woman who cannot roll her tongue and they have three children, two of whom can
roll their tongues and one who cannot. Draw the Punnett Square that illustrates the possible outcomes of
this marriage.
10. What is the man’s phenotype? ___________________________________________________________
11. What is the man’s genotype? ____________________________________________________________
12. What are the genotypes of the children? ___________________________________________________
____________________________________________________________________________________
13. In the critter world, having a blue tail (T) is dominant over having an orange tail (t). A critter with a
heterozygous genotype has children with an orange tailed critter. Draw the Punnett Square that
illustrates the possible outcomes of their critter pups.
14. What percentage of the critter pups will have orange tails? ____________________________________
15. What is the ratio of orange tails pups to blue tails pups? _______________________________________
Name: ______________________________________
Pd: __________
Date:________
Punnett Square Post-test
Directions: Match each definition with the word it belongs with. Place the letter on the line.
1.
2.
3.
4.
5.
6.
7.
8.
____ Heterozygous
____ Homozygous
____ Purebred
____ Hybrid
____ Punnett Square
____ Probability
____ Phenotype
____ Genotype
a. A graphic used to predict the results of a genetic cross
b. An organism’s physical appearance, or visible trait
c. Having two different alleles for a trait (Tt)
d. The offspring of generations that have the same traits
e. Having two identical alleles for a trait (TT or tt)
f. A number that describes how likely it is that an event will occur
g. An organism’s genetic makeup, or allele combinations
h. The offspring of generations that have two different alleles for a trait
9. In humans, being able to roll your tongue (R) is dominant over not being able to (r). A man who can roll
his tongue marries a woman who cannot roll her tongue and they have three children, two of whom can
roll their tongues and one who cannot. Draw the Punnett Square that illustrates the possible outcomes of
this marriage.
10. What is the man’s phenotype? ___________________________________________________________
11. What is the man’s genotype? ____________________________________________________________
12. What are the genotypes of the children? ___________________________________________________
____________________________________________________________________________________
13. In the critter world, having a blue tail (T) is dominant over having an orange tail (t). A critter with a
heterozygous genotype has children with an orange tailed critter. Draw the Punnett Square that
illustrates the possible outcomes of their critter pups.
14. What percentage of the critter pups will have orange tails? ____________________________________
15. What is the ratio of orange tails pups to blue tails pups? _______________________________________