WorksheetsGenetics
Total questions: 83
Worksheet time: 2hrs 2mins
Name
Class
Date
1.
Brown fur is dominant to white fur in dogs. A homozygous dominant dog is crossed with a heterozygous dog. 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
2.
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
3.
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
4.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
5.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
6.
Having two of the same alleles for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
7.
Having two different alleles for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
8.
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
9.
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%
10.
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
11.
An allele whose trait only shows up when no dominant allele is present is called a ______.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
12.
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
13.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
14.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
15.
What is the visual chart called that traces the history of a trait in a family?
a)
Dihybrid Cross
b)
Pedigree
c)
Independent Assortment
d)
Punnett Square
16.
Which set of chromosomes determines that you are a male?
a)
XX
b)
BB
c)
XY
d)
Bb
17.
The different forms of a gene are called _____.
a)
variable
b)
traits
c)
alleles
d)
offspring
18.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
19.
Is the sex of a baby determined by the baby's mother or the father?
a)
mother
b)
father
20.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
21.
The cells produced by meiosis are called _____.
a)
sex cells
b)
somatic cells
c)
body cells
d)
skin cells
22.
What process produces 2 identical cells?
a)
mitosis
b)
meiosis
23.
Females have the sex chromosomes
a)
XX
b)
XY
c)
XXX
d)
XYY
24.
______________________ is the mathematical chance that something will happen.
a)
division
b)
selective breeding
c)
ratio
d)
probability
25.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
26.
A couple has 6 children, all girls. If the mother gives birth to a 7th child, what is the probability that the seventh child will be a girl?
a)
7 out of 7
b)
6 out of 7
c)
1 out of 2
d)
1 out of 7
27.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
28.
Freckles (F) are dominant over no freckles. What is the phenotype of individual #3
a)
Ff
b)
ff
c)
freckles
d)
nonfreckles
29.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
30.
What part of an organism's genetic makeup is received from its mother?
a)
25%
b)
50%
c)
75%
d)
100%
31.
Genes make up DNA and DNA makes up...
a)
Chromosomes
b)
Genetics
c)
Genotype
d)
Punnett Square
32.
Different forms of a same gene are called an __________________
a)
DNA
b)
Gene
c)
Allele
d)
Nuclei
33.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
34.
What is another way of saying "hybrid"?
a)
heterozygous
b)
homozygous dominant
c)
homozygous recessive
d)
none of these choices
35.
Two heterozygous parents produce offspring. What is the probability of the HETEROZYGOUS GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
36.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
37.
HH crossed with Hh. What is the probability of hh?
a)
0%
b)
25%
c)
50%
d)
100%
38.
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
39.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
40.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
41.
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
42.
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%
43.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
44.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
45.
In certain rats, black fur is dominant over white fur. If two rats, both heterozygous for fur color are mated, their offspring would be expected to have
a)
four different genotypes and two different colors
b)
two different genotypes and three different colors
c)
three different genotypes and two different colors
d)
three different genotypes and three different colors
46.
A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are
a)
I(A)i and I(B)I(B)
b)
I(B)I(B) and I(A)I(A)
c)
I(A)i and I(B)i
d)
I(A)I(B) and ii
47.
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
a)
25%
b)
50%
c)
75%
d)
100%
48.
A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
a)
TT and tt
b)
TT and Tt
c)
Tt and Tt
d)
TT and TT
49.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
50.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
51.
What is genetic engineering?
a)
Manipulation/addition of genes
b)
Naturally breeding two animals with desired traits
c)
Cross-pollinating two crops
d)
Harvesting stem cells
52.
In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.
a)
2 red: 2 speckled: 0 white
b)
4 red: 0 speckled: 0 white
c)
0 red: 4 speckled: 0 white
d)
0 red: 2 speckled: 2 white
53.
In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).
Cross a black fowl with a white fowl. What is the phenotype ratio?
Cross a black fowl with a white fowl. What is the phenotype ratio?
a)
4 black: 0 grey: 0 white
b)
2 black: 2 grey: 0 white
c)
0 black: 4 grey: 0 white
d)
0 black: 2 grey: 2 white
54.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
55.
A round watermelon is crossed with a long watermelon and all of the offspring are oval. If two oval watermelons are crossed, what is the percent of the watermelons that will be round?
a)
0
b)
25
c)
50
d)
75
56.
In a certain species of plant, the trait for tall is dominant and the trait for short is recessive. The trait for yellow seeds is dominant and the trait for green seeds is recessive. A cross between two plants results in 292 tall yellow and 103 short green plants. What are the genotypes of the parents?
a)
TTYY x Ttyy
b)
TTYy x TTYy
c)
TTyy x TTYy
d)
TtYy x TtYy
57.
The expression of both alleles for a trait in a hybrid individual is
a)
pleiotropy
b)
epistasis
c)
polygenic
d)
codominance
58.
How many autosomes does the human male normally have?
a)
2
b)
44
c)
46
d)
23
59.
A man with a sex-linked allele will pass it on
a)
to all his daughters
b)
half his daughters
c)
all of his sons
d)
half his sons
60.
Blood type is controlled by 3 alleles. What inheritance pattern is this?
a)
multiple alleles
b)
codominance
c)
incomplete dominance
d)
law of dominance
61.
Blood type AB
a)
epistasis
b)
codominance
c)
incomplete dominance
d)
hybrid vigor
62.
Genes are segments of
a)
DNA
b)
Protein
c)
Alleles
d)
Cells
63.
When humans breed purebred dogs to look a certain way and have traits that they like, this is an example of ___________________________
a)
Probably Breeding
b)
Sectional Breeding
c)
Selective Breeding
d)
Suspended Breeding
64.
FF crossed with ff, what is the probability of the DOMINANT PHENOTYPE appearing in the offspring generation?
a)
0%
b)
25%
c)
50%
d)
100%
65.
Based on these results whose blood was found in the blood stain at the crime scene?
a)
Bob
b)
Sue
c)
John
d)
Lisa
66.
What does GMO stand for?
a)
Genetics Modification Organics
b)
Genetically Modified Oranges
c)
Genetically Made Oranges
d)
Genetically Modified Organisms
67.
What is recombinant DNA?
a)
DNA containing genes foreign to that organism
b)
DNA which has been impacted by epigenetics
c)
DNA that has restriction enzymes
d)
DNA that has been sequenced
68.
A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, probability would predict there would be _____.
a)
8 black guinea pigs
b)
4 black and 4 white guinea pigs
c)
2 black, 4 gray, and 2 white guinea pigs
d)
8 white guinea pigs
69.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
70.
A pattern of inheritance in which one allele is not completely dominant over the other. The heterozygous phenotype clearly expresses both alleles.
a)
Mendelian inheritance
b)
Co-dominance
c)
Incomplete dominance
d)
Sex-linked inheritance
71.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XRXR
a)
female red
b)
female white
c)
male red
d)
male white
72.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
73.
What is the cause of some traits seeming to "skip" a generation?
a)
dominant traits
b)
recessive traits
c)
mutations
d)
natural selection
74.
A diploid body cell with the genotype RrYy undergoes meiosis to form gametes. What are all of the possible allelic combinations that can be found in the gametes? (you need to FOIL)
a)
RR, YY, Rr, Yy
b)
Ry and rY
c)
RrYy and RRYY
d)
RY, Ry, rY, ry
75.
The law that states that the inheritance of one trait has no effect on the inheritance of another is
a)
the law of independent assortment
b)
the law of dominance
c)
the law of segregation
76.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
77.
How many girls did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
78.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
79.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
80.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
81.
What does a horizontal line between a square and a circle mean?
a)
They are siblings
b)
They are cousins
c)
They are married ("together")
d)
They are the children
82.
What does a vertical line coming down from a square and circle that are connected by horizontal line indicate?
a)
They are cousins
b)
The children
c)
Aunts and Uncles
83.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
100 %
