Genetics: Test Review Sheet
The Genetics Unit Exam will be on Thursday, December 3, 2015. To be prepared and
successful on the exam, you will need to be able to define vocabulary words and be able to
apply your knowledge of genetics. Think back to all your work on past worksheets, lab
stations, and notes. Below are practice questions and vocabulary to support your studies.
I. Define key vocabulary words
Inheritance_________________________________________________________________________________________________
Heterozygous_________________________________________________________________________________________________
Homozygous_________________________________________________________________________________________________
Genotype_________________________________________________________________________________________________
Phenotype________________________________________________________________________________________________
II. Reproduction
Complete the following chart on Asexual and Sexual Reproduction
Description
Asexual Reproduction
Sexual Reproduction
# of parents
Compare the offspring
to the parent
(Identical/genetically
different)
What cell division
usually happens within
this type of
reproduction
(Meiosis/Mitosis)
Draw a simple diagram
of each type of
reproduction
Genetics: Test Review Sheet
III. DNA, Chromosomes, Genes
Explain the relationship between DNA, Chromosomes, and Genes.
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
List 4 Characteristics of DNA
(What kind of structure is it?)
(What are the “steps” within the ladder called?)
(Where is it located?)
(What is its function?)
1. ___________________________
2. ___________________________
3. ___________________________
4. ___________________________
Do any two individuals have the same DNA? Explain.
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
IV. Punnett Squares
Example 1: In humans, being right handed (R) is a dominant trait controlled by a single
gene. Left-handedness (r) is recessive. Sandy is homozygous dominant for this inheritable
trait but he husband is homozygous recessive. They want to know the possible handedness
of their offspring. Complete the Punnett Square below, noting the ratio of genotypes and
the phenotypes.
Genotype
Phenotype
Chance
Example 2: A boy has blood type O but his mother has blood type A. What are the mother
an father’s blood genotypes? Complete the chart below. Complete a Punnett Square to
determine their genotype.
Family Member
Mother
Father
Son
Phenotype
A
Genotype
O
OO
Genetics: Test Review Sheet
V. Pedigree Charts
Example 1:
Example 2: Write the answers to these questions in the space provided. Use the numbers
to show which people are the answers to each question.
1. In this pedigree, which numbers are females? __________________________________________
2. Which numbers are males? __________________________________________
3. Who is #9 married to? __________________________________________
4. How many children does couple 1 and 2 have? _______________________________________________
6. Which show the trait for which the pedigree was constructed? _____________________________
7. Is this trait dominant or recessive? Why?
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