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WorksheetsMendelian Genetics
Total questions: 98
Worksheet time: 2hrs 10mins
Name
Class
Date
1.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
2.
B=brown eyes
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.
b= blue eyes
What is true about these 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
3.
T = tall an t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
4.
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
5.
Aa, DD, Bb, yy are all examples of
a)
genotypes
b)
phenotypes
6.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
7.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
8.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
9.
Who is the father of genetics?
a)
Charles Darwin
b)
Gregor Mendel
c)
Dimitri Mendeleev
d)
Hans Krebs
10.
When a plant self-pollinates and all offspring have the same trait as the parent, it is called
a)
true-breeding plant
b)
cross-breeding plant
c)
self-propagating plant
d)
hybrid plant
11.
An organism with two different alleles for a trait is said to be:
a)
recessive
b)
hybrid
c)
dominant
d)
purebred
12.
The letter P in a "P" Generation stands for:
a)
Probability
b)
Puppy
c)
Punnet
d)
Parent
13.
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
14.
Different forms of genes:
a)
alleles
b)
phenotype
c)
genotype
d)
homologous chromosomes
15.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
16.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
17.
Having two of the SAME alleles for a trait (example HH or hh):
a)
homozygous
b)
heterozygous
c)
recessive
d)
dominant
18.
When is a recessive allele expressed in offspring?
a)
when two copies are present
b)
when parents have no dominant alleles
c)
when the offspring is heterozygous
d)
when one copy is present
19.
Recessive alleles may not be expressed because they are
a)
masked by a dominant allele
b)
the least common allele in a population.
c)
the most common allele in a population.
d)
less likely to have crossing over.
60.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
21.
The allele that is expressed over another.
a)
Dominant
b)
Recessive
c)
Genotype
d)
Phenotype
22.
Mendel's law of segregation states that during meiosis, the alleles that control each trait separate, and only _________________ from each pair is/are passed to the offspring
a)
one allele
b)
the dominant trait
c)
two alleles
d)
the recessive trait
23.
The Law of Segregation states that alleles separate during the process of ...
a)
Mitosis
b)
Meiosis
c)
Fertilization
d)
Replication
24.
In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?
a)
0%
b)
25%
c)
75%
d)
100%
25.
Long tongues (T) are dominant to short tongues in green tree frogs. What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?
a)
100%
b)
75%
c)
50%
d)
25%
26.
In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
27.
Why is crossing over important?
a)
Increases the number of genes that can be inherited
b)
Increases genetic variation
c)
Decreases the occurrence of genetic diseases
d)
Decreases the number of genes that can be inherited
28.
The passing on of physical or mental characteristics genetically from parent to offspring.
a)
mitosis
b)
heredity
c)
hydrogen bonds
d)
chromosomes
29.
The genetic makeup of the flower is _____________
a)
red
b)
heterozygous
c)
homozygous dominant
d)
homozygous recessive
30.
The genetic make up of this flower is ________.
a)
homozygous recessive
b)
heterozygous
c)
homozygous dominant
d)
white
31.
The genetic makeup of the flower is ______.
a)
homozygous dominant
b)
heterozygous
c)
pink
d)
homozygous recessive
32.
A diagram used to predict an outcome of a cross or breeding experiment.
a)
pedigree
b)
Punnet Square
33.
In pea plants, tall (T) is dominant over short (t). Suppose a tall plant is crossed with a short pea plant, and 400 seeds are produced and planted. If 196 plants are short, what were the likely parental genotypes?
a)
TT x TT
b)
Tt x Tt
c)
Tt x tt
d)
tt x tt
34.
T3 - The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
35.
T4 - A Punnett 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
36.
T4 - The genotypic ratio here is
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
37.
T4 - If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
38.
T4 - If T=Tall & t=short, what is the phenotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
39.
All characteristics are inherited, but environmental factors can change some of them.
a)
True
b)
False
40.
Chromosomes carry the genes for different traits.
a)
True
b)
False
41.
1. In a certain species of animal, black fur (B) is dominant over tan fur (b).
Which type of dominance does this cross show?
Which type of dominance does this cross show?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
42.
In a certain species of animal, black fur (B) is dominant over tan fur (b). If two heterozygous parents were crossed what would the parent genotypes be?
a)
BBxbb
b)
BBxBb
c)
BbxBb
d)
bbxBb
43.
In a certain species of animal, black fur (B) is dominant over tan fur (b). If two heterozygous parents were crossed what percentage of the offspring would be Homozygous dominant?
a)
0%
b)
25%
c)
50%
d)
75%
44.
In a certain species of animal, black fur (B) is dominant over tan fur (b). If two heterozygous parents were crossed what percentage of the offspring would be Homozygous recessive?
a)
0%
b)
25%
c)
50%
d)
75%
45.
In a certain species of animal, black fur (B) is dominant over tan fur (b). If two heterozygous parents were crossed what percentage of the offspring would be Heterozygous?
a)
0%
b)
25%
c)
50%
d)
75%
46.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
47.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed-what would the parent genotypes be?
a)
RRxR1R1
b)
RR1x RR1
c)
RRxRR1
d)
R1R1xRR
48.
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%
49.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed-what percentage of the offspring would be homozygous red?
a)
0%
b)
25%
c)
50%
d)
75%
50.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed-what percentage of the offspring would be Heterozygous Pink?
a)
0%
b)
25%
c)
50%
d)
75%
51.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
52.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
53.
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
54.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
55.
Which of the following is a hybrid?
a)
BB
b)
bb
c)
Bb
56.
Which of the following is purebred?
a)
AA
b)
aa
c)
Aa
d)
Both AA and aa
57.
In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (BB') what are the chances of having a chicken that is black and white?
a)
50%
b)
0%
c)
25%
d)
100%
58.
bb crossed with BB, what is the probability of Bb?
a)
0%
b)
25%
c)
50%
d)
100%
59.
What do the letters inside the grid of a Punnett square represent?
a)
phenotypes of parents
b)
genotypes of potential offspring
c)
testcrosses of potential offspring
d)
chromosomes of parents
60.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
61.
Recessive alleles are represented by:
a)
a ratio
b)
a percentage
c)
capital letters
d)
lower-case letters
62.
What part of an organism's genetic makeup is received from its mother?
a)
25%
b)
50%
c)
75%
d)
100%
63.
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
64.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
65.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
66.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
67.
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
68.
A red flowered plant (RR) is crossed with a white flowered plant (R'R'). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RR') flowers?
a)
0%
b)
25%
c)
50%
d)
100%
69.
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)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
70.
R = tongue rolling, r = no tongue rolling. An individual who is Rr can roll their tongue. What type of inheritance pattern does this follow?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
71.
If you cross a heterozygous tongue roller and a non-tongue roller, what are the chances of having children who can roll their tongue?
a)
100%
b)
75%
c)
50%
d)
25%
72.
What type of inheritance pattern is shown here?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
73.
If a man with straight hair marries a woman with curly hair, all of their children have wavy hair. What type of inheritance pattern does this follow?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
74.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
75.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
76.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
77.
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
78.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
79.
Which type of inheritance causes both traits to be expressed equally in the heterozygote?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
80.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
81.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
82.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
83.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
84.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
85.
What is NOT a possible genotype for someone with type B blood?
a)
BB
b)
AB
c)
BO
86.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
87.
Which term(s) best describes the inheritance of human blood types?
a)
incomplete dominance and multiple alleles
b)
codominance and epistasis
c)
codominance and multiple alleles
d)
incomplete dominance and codominance
88.
A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?
a)
Yes
b)
No
89.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
90.
In fruit flies, eye color is a sex linked trait. Red is dominant to white. What would be the percentages of offspring of a cross of a white eyed female with a red-eyed male?
a)
1 female white eyes, 1 female red-eyes, 1 male white eyes, 1 male red-eyes
b)
2 female red eyes, 2 males white eyes
c)
2 female white eyes, 2 males red eyes
d)
2 female red eyes, 1 male red eyes, 1 male white eyes
91.
Why do all the daughters in Generation II carry the colorblind gene?
a)
Because mom passed on the gene.
b)
Because dad passed on the X chromosome.
c)
Because their brother has it.
d)
Because their brother gave it to them.
92.
Which gender can be carriers of colorblindness and not have it?
a)
Just males
b)
Just females
c)
Both genders
93.
Why does individual IV-5 have colorblindness?
a)
Because his mom is a carrier.
b)
Because his dad has it.
c)
Because his siblings have it.
d)
Because his uncle has it.
94.
Name 2 IV generation colorblind males.
a)
IV-1 and IV-2
b)
IV-1 and IV-6
c)
IV-5 and IV-8
d)
IV-1 and IV-5
95.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
96.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked
97.
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
98.
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
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