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WorksheetsGenetics Study Guide
Total questions: 50
Worksheet time: 38mins
Name
Class
Date
1.
Who was the father of genetics
a)
Sagan
b)
Issac Newton
c)
Gregor Mendel
d)
C.jenkins
2.
which is heterozygous ?
a)
Tt
b)
TT
3.
Which is homozygous ?
a)
Zz
b)
SS
4.
what predicts the outcome
a)
genetic engineering
b)
punnet square
c)
probability
5.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
6.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
7.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
8.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
9.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
10.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
11.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
12.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
13.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
14.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
15.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
16.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
17.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
18.
Which answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
19.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
20.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
21.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
22.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
23.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
24.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over which alleles are exchanged
25.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
26.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
27.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
28.
Organism with two of the same allele for a given trait.
a)
heterozygous
b)
homozygous
c)
phenotype
d)
genotype
29.
What is the genotypic ratio here
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
30.
What percent of offspring will have the recessive trait?
a)
25
b)
50
c)
75
d)
100
31.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
32.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
33.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
34.
How do two purple flowers produce white flower offspring?
a)
They cant have white flowered offspring
b)
Both flowers are heterozygous and can pass on the white allele
c)
They are both homozygous Dominant
d)
They do not have the recessive allele in their genotype
35.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
36.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
37.
Dominant or Recessive?
TT
TT
a)
Dominant
b)
Recessive
38.
Dominant or Recessive?
M
M
a)
Dominant
b)
Recessive
39.
Where do your inherited genes come from?
a)
offspring
b)
parents
c)
gametes
d)
grandchildren
40.
What is an allele called that is expressed even if only one copy is present in a genotype?
a)
recessive allele
b)
complete allele
c)
dominant allele
d)
impressive allele
41.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
42.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
43.
To be a yellow seed genotype must be
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
44.
A Punnet Square will
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
45.
the blending of two traits
a)
blending
b)
recessive trait
c)
incomplete dominance
d)
homozygous
46.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
47.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
48.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
49.
A tall plant (TT) is crossed with a short plant (SS) and a medium plant (TS) results. This is what type of inheritance pattern?
a)
Incomplete Dominance
b)
Codominance
50.
If you cross a black chicken with a white chicken, only checkered chickens would be produced. What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
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