WorksheetsGenetics
Total questions: 91
Worksheet time: 2hrs 10mins
Name
Class
Date
1.
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
2.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
3.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
4.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
5.
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
6.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
7.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
8.
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
9.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
10.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
11.
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
12.
Which characteristic would most likely be inherited by a baby?
a)
brown hair
b)
crying a lot
c)
ability to jump high
d)
his ability to talk
13.
The following are inherited traits of humans EXCEPT...
a)
long hair
b)
blue eyes
c)
long eyelashes
d)
small dimples
14.
Which characteristic is inherited?
a)
hair color
b)
sleeping late
c)
enjoying hiking
d)
loving to read
15.
Which trait does a puppy inherit from its parents?
a)
fur color and pattern
b)
obedience to commands
c)
food brand preference
d)
affection for a specific home
16.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
17.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
18.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
19.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
20.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
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 T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
23.
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
24.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
25.
A gene is
a)
a section of DNA
b)
a chemical found in the nucleus of cells
c)
contains instructions for building a protein
d)
all of the above
26.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
27.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
28.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
29.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
30.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
31.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
32.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
33.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
34.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
35.
In this punnett square, which is the dominant trait?
The B stands for bud.
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
36.
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
37.
The study of heredity and the variation of inherited characteristics
a)
gene
b)
genetics
c)
meiosis
d)
hybrid
38.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
39.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
40.
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
41.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
42.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
43.
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%
44.
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
45.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
46.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
47.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
48.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
49.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
50.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
51.
Who is considered the "father" of modern genetics?
a)
Einstein
b)
Mendel
c)
Disney
d)
Washington
52.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
53.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous
54.
Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
55.
A physical characteristic that can be passed from parent to offspring.
a)
behavior
b)
trait
c)
strong muscles
d)
ability to fly a plane.
56.
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
57.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
58.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
59.
In the punnett square shown, what is the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
60.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
61.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
62.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
According to the Punnett Square, what is the probability of an offspring being white?
a)
25%
b)
0%
c)
100%
d)
50%
63.
B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
Bb x bb
64.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
65.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
66.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
According to the Punnett Square, what is the probability of an offspring being white?
a)
25%
b)
0%
c)
100%
d)
50%
67.
Purple (P) is dominant to the white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
68.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
69.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
70.
What is the genotypic ratio here?
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
71.
What does a Punnett Square do?
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
72.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
73.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
74.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
75.
What are the phenotype percentages of the offspring?
(A-Brown fur color; a-white fur color)
a)
50 % Brown fur and 50% White fur
b)
25 % Brown fur and 75% White fur
c)
75 % Brown fur and 25% White fur
d)
0% Brown fur and 100% White fur
76.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
77.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
78.
What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?
a)
0%
b)
25%
c)
50%
d)
75%
79.
Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?
a)
Red
b)
Blue
c)
Purple
d)
50% Red, 50% Blue
80.
Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?
Who wins the bet?
a)
Leonardo
b)
Olivet
c)
Both
d)
Neither
81.
A Jawa notices that his beloved pet desert rat, who has brown fur, just had several rat babies, some of which had white fur and some which had brown fur. Brown fur is the dominant trait. This means his rat must have what genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
82.
Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
83.
What is a GENOTYPE?
a)
the genetic make-up of an organism
b)
the physical trait of an organism
c)
mitosis
d)
meiosis
84.
Which of the following are GENOTYPES? (select all correct answers)
a)
black hair
b)
homozygous dominant
c)
heterozygous
d)
blue eyes
e)
BB
85.
PHENOTYPE is
a)
the genetic make-up of an organism
b)
the physical trait of an organism
c)
nucleic acid
d)
Aa
86.
Which of the following are PHENOTYPES?
a)
green skin
b)
Aa
c)
homozygous recessive
d)
purple eyes
e)
black fur
87.
The prefix "homo" means
a)
different
b)
same
c)
tomorrow
d)
never
88.
The prefix "hetero" means
a)
different
b)
ugly
c)
fancy
d)
same
89.
If A = red fur and a = white fur, what are the PHENOTYPIC ratios of the offspring based on the Punnett Square?
a)
25% heterozygous
b)
50% purple
c)
75% red fur and 25% white fur
d)
25% homozygous recessive, 50% heterozygous, 25% homozygous dominant
90.
If A = green pods and a = yellow pods, what are the GENOTYPIC RATIOS of the offspring in the Punnett square?
a)
100% green pods
b)
100% yellow pods
c)
100% heterozygous
d)
100% homozygous dominant
91.
If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring in the Punnett square?
a)
100% green pods
b)
100% yellow pods
c)
100% heterozygous
d)
100% homozygous dominant
100 %
