Genetics Test Prep Quiz
Rules
• Each student starts with 100 points.
• You can bet as much as little as possible on
each question based on what you think you may
know about the subject.
• The person next to you will keep your score.
• Get several pieces of extra credit paper in which
to write your answers.
– You can use the same piece of scratch paper multiple
times.
• No sharing answers.
– If you are caught cheating, you will receive a zero on
this quiz!
Rules
• Scoring:
– Simply add or subtract each players wager from total.
– Keep a running total.
– Players must wager at least 10 points per question
(but can wager more).
– Over 200 points = A
– 150-199 points = B
– 100-149 points = C
– 50-99 points = D
– Under 50 points = F
– If you run out of point to bet with, you are done!
Example Question
• Category: Genetic Terms
• Question: What to we call alternative
forms of the same gene?
• Answer: Alleles
Question #1
• Category: Gregor Mendel
• Question: How many traits (total) did
Mendel observe in his study of pea plants
• Answer: 7
Question #2
• Category: Mendelian Terms
• Question: The hybrid offspring of the P
generation are called the __________.
• Answer: F1 Generation
Question #3
• Category: Mendelian Genetics
• Question: If you cross a true breeding purple
flowered pea plant with a true breeding white
flowered plant to produce an F1 generation. You
then allow the F1 to self-pollinate. Assuming the
inheritance pattern is simple
dominant/recessive, what will be the phenotypic
ratio of the F2?
• Answer: 3 purple: 1 white
Question #4
• Category: Genetics Terms
• Question: The specific location of a gene
on a chromosome is called a ________.
• Answer: Locus
Question #5
• Category: Genetics Terms
• Question: If an organism has a genotype
(Aa) for a specific trait, it is said to be
___________ for that trait.
• Answer: Heterozygous
Question #6
• Category: Mendels experiments
• Question: Mendel knew that by looking at a dominant
phenotype, you could not tell what the genotype was of
that organism by looking at the dominant phenotype (TT
or Tt). He came up with the Test Cross to determine the
genotype of his pea plants with dominant characteristics.
He crossed pea plants with dominant phenotypes with
peas plants with this genotype to determine the
genotype of the dominant plants?
• Answer: Homozygous recessive (tt)
Question #7
• Category: Dihybrid Crosses
• Question: If you perform a dihybrid cross
and get a 9:3:3:1 phenotypic ratio in the
next generation, what is the genotype of
each parent?
• Answer: Heterozygous for both traits
Question #8
• Category: Probability
• Question: The _________ rule states
that the probability that two or more
independent events will occur together is
the product of their individual
probabilities (the rule of “and”)
• Answer: Multiplication
Question #9
• Category: Probability
• Question: If you cross two individuals that
are heterozygous for one trait. What is the
probability that there offspring will be
heterozygous for that trait as well?
• Answer: ½ or 50%
Question #10
• Category: Inheritance Patterns
• Question: If you cross a true breeding red
flowered plant with a true breeding white
flowered plant and all of the F1 comes out pink.
You then allow all of the F1 to self-pollinate and
you get a phenotypic ratio in the F2 of (1 Red: 2
Pink: 1 White). What is the inheritance pattern?
• Answer: Incomplete dominance
Question #11
• Category: ABO Blood typing
• Question: In humans, type A blood is
________ to type B blood, creating the AB
blood type.
• Answer: Co-dominant
Question #12
• Category: ABO Blood Typing
• Question: If a women with type A blood
has a child with type B blood. What his her
genotype and what are the possibilities of
the fathers genotype?
• Answer: Mother = IAi
Father = IBIB or IBi or IAIB
Question #13
• Category: Genetic Terms
• Question: In________, a gene at one locus
alters the phenotypic expression of a gene at
a second locus. This occurs in coat colors in
mammals.
• Answer: Epistasis
Question #14
• Category: Genetics Terms
• Question: Quantitative variation usually
indicates _______________, an additive
effect of two or more genes on a single
phenotype. An example is human skin
coloring.
• Answer: Polygenic Inheritance
Question #15
• Category: Genetics Terms
• Question: A ________ is a family tree
that describes the interrelationships of
parents and children across generations
• Answer: Pedigree
Question #16
• Category: Genetics Terms
• Question: __________are heterozygous
individuals who carry the recessive allele but
are phenotypically normal (i.e., pigmented)
• Answer: Carriers
Question #17
• Category: Genetics Testing
• Question: In ________, the liquid that
bathes the fetus is removed and tested
for genetic disorders.
• Answer: Amniocentesis
Adding it up
• Add up your partners final total on a clean piece
of extra credit paper and turn it in to me with
their name on it.
• Make sure you show them the score.
• Grading (Again)
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–
–
–
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Over 200 points = A
150-199 points = B
100-149 points = C
50-99 points = D
Under 50 points = F