Name: _________________________
Mrs. Krejnus – Heredity Lesson
Class Period: _____
Directions:
-To determine what your creature looks like pick two copies of each “gene” from the brown bag.
Why do you have to pick two?
-Repeat for each trait (tail length, fur color, antlers and fangs)
-Record the genes for your creature in the data table
-Use the genetic code for your creature (also called the genotype) and determine the creature’s ______
Hint: look at the Powerpoint
-Finally, use the data table to draw your creature
Data Table:
XXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXX
Tail Length (T or t)
Fur color (G or g)
Antlers (A or a)
Fangs (F or f)
genotype
First copy
Second copy
phenotype
Phenotype means?
Keep this worksheet!
Tomorrow we are going to cross your creature with another student’s creature and see what the
offspring would most likely look like.
Name: _________________________
Mrs. Krejnus – Heredity Lesson
Class Period: _____
Directions:
-To determine what your creature looks like pick two copies of each “gene” from the brown bag.
Why do you have to pick two?
-Repeat for each trait (tail length, fur color, antlers and fangs)
-Record the genes for your creature in the data table
-Use the genetic code for your creature (also called the genotype) and determine the creature’s ______
Hint: look at the Powerpoint
-Finally, use the data table to draw your creature
Data Table:
XXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXX
Tail Length (T or t)
Fur color (G or g)
Antlers (A or a)
Fangs (F or f)
genotype
First copy
Second copy
phenotype
Phenotype means?
Keep this worksheet!
Tomorrow we are going to cross your creature with another student’s creature and see what the
offspring would most likely look like.
Name: _________________________
Mrs. Krejnus – Creature Crosses
Class Period: _____
Directions:
-Use the Punnett squares provided on this worksheet.
-Using the heredity lesson worksheet from the last class; fill in the genotype of your creature on top of
the Punnett square.
Hint: Put one letter in each circle.
-Repeat for each trait
-Find a classmate that has the same creature as you.
-Fill in the genotype of your partner’s creature along the side of the Punnett square.
-Write the one letter from your creature and the one letter from your partner’s creature in the
corresponding square.
-Use the Punnett square to answer the questions at the bottom of the worksheet.
Tail length
Fur Color
Antlers
Fangs
Remember there are 4 squares. All 4 squares together are equal to 100%. That means that each single
square is equal to ______%.
Questions:
1. a. How many offspring will have a long tail? _____ /4 ; ______%
b. How many offspring will have a short tail? _____ /4 ; ______%
Explain why.
2. a. How many offspring will have green fur? _____ /4 ; ______%
b. How many offspring will have orange fur? _____ /4 ; ______%
Explain why.
3.
a. How many offspring will have antlers? _____ /4 ; ______%
b. How many offspring will have no antlers? _____ /4 ; ______%
Explain why.
4.
a. How many offspring will have fangs? _____ /4 ; ______%
b. How many offspring will have no fangs? _____ /4 ; ______%
Explain why.