Name: __________________________________
Date: ________________
Period: ________
Station # 1
A. Dogs
Dark brown fur is a dominant trait in dogs (D), and light brown fur is recessive (d).
1) A female dog is homozygous recessive for this trait. What is her genotype?
2)
What is this female dog’s phenotype? __________________
3)
A male dog is heterozygous for this trait, what is his genotype?
_______
________
4) What is the same male dog’s phenotype? _________________
5)
Complete the ​Punnett square​: →
6) What are the chances their offspring will be dark brown?
___________
7) What are the chances their offspring will be light fur?
___________
B. Flowers
A florist noticed there was a species of flower with two unique phenotypes. Some of the flowers
had pointed petals (B) and other flowers had rounded petals (b). The florist breeds two flowers;
both have pointed petals, and create offspring. The offspring are planted and 8 weeks later all 3
offspring have rounded petals. Complete a Punnett square to show how this can happen.
8) In your own words explain how this can happen:
__________________________________________________________
__________________________________________________________
__________________________________________________________
Station #2
A. Eyes
In humans, brown eyes are dominant over blue. A brown-eyed man marries a blue-eyed woman
and they have three children, two of whom are brown-eyed and one of whom is blue-eyed.
Draw the Punnett square that illustrates this marriage in the space below.
What is the man’s genotype?________________
What are the genotypes of the children? __________________
B. Peas
Round peas are dominant over wrinkled peas.
Cross ​Rr x Rr
What percent are RR? ________
What percent are Rr? ________
What percent are rr? ________
What percent are round? ________
What percent are wrinkled? ________
Station #3
Use the computer to go to the site:
​http://learn.genetics.utah.edu/
Go to the ​Single Gene Disorders section:
1) Name a disorder: __________________________________________________
2) Explain what the disorder is:
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
3) List symptoms, treatments, or interesting facts of your disorder:
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
4) Go to the virtual DNA extraction lab and give it a try. Write down what you learned:
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Station #4
A. Tongues
Tom’s father was a homozygous dominant (purebred) tongue roller (TT)and his mother was
heterozygous for tongue rolling (hybrid) (Tt). Show the genetic match in the Punnett Square
below.
A.
B.
C.
D.
E.
F.
What are the possible genotypes of the offspring? __________
What is the chance of having a homozygous dominant offspring?__________
What is the chance of having a heterozygous offspring? __________
What is the chance of having a homozygous recessive offspring? __________
What is the chance of having an offspring with the ability to roll their tongue? __________
What is the chance of having an offspring without the ability to roll their tongue? __________
B. Chickens
Co-Dominant Punnett Square
Cross an all black chicken (BB) with
a black & white chicken (BW)
What % are all black? __________
What % are all white? __________
What % are black & white? __________
What % of the parents are homozygous? __________
What % of the parents are heterozygous? __________
What % of the offspring are homozygous? __________
What % of the offspring are heterozygous? __________
Station #5
A. Make your own punnett square cross and answer the questions that follow.
__________ x _________
What are the possible genotypes of the offspring? __________
What is the chance of having a homozygous dominant offspring?__________
What is the chance of having a heterozygous offspring? __________
What is the chance of having a homozygous recessive offspring? __________
What is the chance of having an offspring with the dominant trait? __________
What is the chance of having an offspring with the recessive trait? __________
B. Vocabulary Examples
Using the letter T, show the genotype
● Homozygous dominant - ____________
● Heterozygous - ___________
● Homozygous recessive - __________
Station #6
Visit the following website:
http://glencoe.mheducation.com/sites/0078778066/student_view0/self-check_quizzes.html
Complete the self-check quizzes for
Chapter 5: Heredity
-
Section 1
Section 2
Section 3
Email results to ​[email protected]
-use your student ID email