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WorksheetsHeredity Test
Total questions: 100
Worksheet time: 1hrs 11mins
Name
Class
Date
1.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
2.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
3.
If B is for brown hair, and b is for blonde hair
What is the phenotype for Bb?
What is the phenotype for Bb?
a)
Brown Hair
b)
Blonde Hair
c)
Brown and Blonde Hair
d)
Black Hair
4.
The two-letter code that describes the genetic traits of an organism is called a-
a)
Phenotype
b)
Genotype
c)
Physical Appearance
d)
Intelligence
5.
The different forms of a gene are called
a)
traits
b)
chromosomes
c)
alleles
d)
peas
6.
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
7.
T - tall and t = short
In the punnett square below, what belongs in the missing square.
(Click the picture to see it without the text)
In the punnett square below, what belongs in the missing square.
(Click the picture to see it without the text)
a)
tt
b)
Tt
c)
Bb
d)
TT
8.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
9.
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%
10.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
11.
Who is considered to be the "father" of genetics?
a)
Childers
b)
Einstein
c)
Sutton
d)
Mendel
12.
The mathematical chance that an event will occur is called?
a)
dumb luck
b)
genetics
c)
probability
d)
genes
13.
The different forms of the same gene are called?
a)
genes
b)
alleles
c)
probability
d)
chromosomes
14.
Genes are located on these:
a)
alleles
b)
genes
c)
phenotype
d)
chromosomes
15.
Genetics is the study of:
a)
heredity
b)
offspring
c)
Punnett squares
d)
none of these
16.
If you saw the following pair of alleles AA, it would represent:
a)
recessive
b)
heterozygous
c)
tall
d)
dominant
17.
Which pair below would represent a recessive pair of alleles?
a)
Aa
b)
AA
c)
aa
d)
aA
18.
A unit that determines a trait is called?
a)
gene
b)
chromosome
c)
DNA
d)
allele
19.
The genetic make-up of an organism is called it's?
a)
phenotype
b)
gene
c)
meiosis
d)
genotype
20.
The physical appearance of a trait, or what it looks like is called?
a)
genotype
b)
allele
c)
gene
d)
phenotype
21.
If you saw either pair of alleles, AA or Aa, how would you describe them?
a)
homozygous
b)
heterozygous
c)
dominant
d)
recessive
22.
If you saw the following allele Aa, how would you describe it?
a)
tall
b)
homozygous
c)
recessive
d)
heterozygous
23.
When the phenotypes of two alleles are blended or mixed it is called?
a)
incomplete dominance
b)
co-dominant
c)
recessive
d)
polygenic traits
24.
A useful tool that shows the possible combination of alleles for offspring in a genetic cross?
a)
pedigree chart
b)
Punnett square
c)
Mendel square
d)
none of these
25.
Form of a gene that when present is seen or covers up the appearance of a recessive allele?
a)
recessive
b)
dominant
c)
heterozygous
d)
homozygous
26.
If you cross the following in a Punnett square BB X bb B = big / b= small, what percentage of offspring will be small?
a)
0%
b)
25%
c)
50%
d)
100%
27.
If a flower is white and white is a recessive trait in that plant, what must it's genotype be?
P = purple p = white
P = purple p = white
a)
PP
b)
Pp
c)
pp
d)
Ab
28.
A genetically determined characteristic
a)
Trait
b)
Allele
c)
Homozygous
d)
Phenotype
29.
Passing of traits from one generation to the next (kids inherit traits from their parents)
a)
Heredity
b)
Homologous pair
c)
Heterozygous
d)
Genotype
30.
A stretch of DNA that codes for a trait
a)
Gene
b)
Allele
c)
Trait
d)
Crossing over
31.
Long strand of DNA that contains hundreds or even thousands of genes
a)
Chromosome
b)
Gene
c)
Allele
d)
Trait
32.
Same size chromosomes that have the same types of genes in the same places
a)
Heterozygous
b)
Homozogyous
c)
Homologous pair
d)
Allele
33.
Version/variant of a gene
a)
Allele
b)
Trait
c)
Genotype
d)
Phenotype
34.
Traits you can see (brown hair,freckles, etc.)
a)
Genotype
b)
Phenotype
c)
Allele
d)
Trait
35.
Combination of alleles that an individual has for a certain gene (BB, Bb, bb)
a)
Genotype
b)
Phenotype
c)
Chromosome
d)
Trait
36.
Two of the same alleles for a specific gene (BB, bb)
a)
Homozygous
b)
Heterozygous
c)
Allele
d)
Genotype
37.
Two different alleles for a specific gene (Bb)
a)
Homozygous
b)
Heterozygous
c)
Allele
d)
Trait
38.
In humans, wet earwax (E) is dominant to dry earwax (e)
Dad: Homozygous recessive
Mom: Heterozygous
How many potential offspring have wet earwax ? ___/4
Dad: Homozygous recessive
Mom: Heterozygous
How many potential offspring have wet earwax ? ___/4
a)
1/4
b)
2/4
c)
3/4
d)
4/4
39.
What is the passing of traits from one generation to another?
a)
heterozygous
b)
heredity
c)
chromosome
d)
DNA
40.
What is a phenotype?
a)
one gene from the gene pair
b)
the physical expression of the genes
c)
the set of genes carried by the organism
41.
What is a genotype?
a)
one gene from the gene pair
b)
the physical expression of the genes
c)
the set of genes carried by the organism
42.
What is an allele?
a)
one gene from the gene pair
b)
the physical expression of the genes
c)
the set of genes carried by the organism
43.
Inherited traits are characteristics that are passed from _____________ to _____________.
a)
Parent to offspring
b)
Cousin to cousin
c)
Offspring to parent
d)
Boyfriend to girlfriend
44.
What is a dominant trait?
a)
only be expressed if two recessive alleles are present.
b)
will be expressed regardless of the other allele(s) present
45.
What is a recessive trait?
a)
will only be expressed if two recessive alleles are present.
b)
will be expressed regardless of the other allele(s) present
46.
Alleles for recessive traits are represented by…
a)
Uppercase letters
b)
Lowercase letters
c)
Numbers
47.
Alleles for dominant traits are represented by
a)
Uppercase letters
b)
Lowercase letters
c)
Numbers
48.
Aa is…
a)
Heterozygous
b)
Homozygous
49.
AA is
a)
Heterozygous
b)
Homozygous
50.
aa is…
a)
Heterozygous
b)
Homozygous
51.
What is the difference between heterozygous and homozygous?
a)
Homozygous - one dominant allele and one recessive allele.
b)
Heterozygous - two dominant alleles
c)
Heterozygous contains two recessive alleles.
d)
Heterozygous - 1 dominant allele and 1 recessive allele.
52.
What is the difference between heterozygous and homozygous?
a)
Homozygous - one dominant allele and one recessive allele.
b)
Heterozygous - two dominant alleles
c)
Heterozygous contains two recessive alleles.
d)
Heterozygous - 1 dominant allele and 1 recessive allele.
53.
What is the condition where the dominant allele does not completely mask the recessive?
a)
Complete dominance
b)
Incomplete dominance
c)
Co-dominance
54.
What is the condition where there is more than one dominant allele?
a)
Complete dominance
b)
Incomplete dominance
c)
Co-dominance
55.
What event shows an example of co-dominance?
a)
A black bear and a black bear breeding to form a black bear.
b)
A white bear and a white bear breeding to form a white bear.
c)
A black bear and a white bear breeding to form a black bear.
d)
A black bear and a white bear breeding to form a panda.
56.
In a blend between FF and ff, list the offspring genotypes.
a)
FF, ff, FF, ff
b)
Ff, Ff, ff, ff
c)
Ff, ff, ff, ff
d)
Ff, Ff, ff, ff
57.
tool that predicts the ratio or percentage of possible genes of offspring
a)
Punnett square
b)
Pinnett square
c)
Punnet circle
d)
Pinnett circle
58.
When one allele from each parent is placed in the individual squares, what is formed?
a)
A new gene pair
b)
A bond
c)
Cousins
59.
In this example, tallness (T) is the _________ trait and __________ (t) is the recessive trait.
a)
Recessive, dominant
b)
Dominant, recessive
c)
Beneficial, harmful
d)
Harmful, beneficial
60.
If T = tallness and t = shortness, then these genotypes will have the following phenotypes.
a)
TT: tall; Tt:tall; tt: tall
b)
TT:short; Tt:short; tt:short
c)
TT:tall; Tt:tall tt:short
d)
TT:short; Tt:short; tt:tall
61.
If the two alleles are the same (TT or tt), the genotype is considered…
a)
Heterozygous
b)
Neutral
c)
Homozygous
62.
If the two alleles are different (Tt), the genotype is considered….
a)
Heterozygous
b)
Neutral
c)
Homozygous
63.
List the ratios and percentages of the genotypes of GG and YY.
a)
100% GY
b)
25% GY, 25% gy, 25% Gy, 25% gY
64.
What is a genotype?
a)
set of genes that it carries (represented by letters)
b)
all of its observable characteristics
65.
What is a phenotype?
a)
set of genes that it carries (represented by letters)
b)
all of its observable characteristics
66.
What would be the genotypic ratio of the offspring of Tt and Tt?
a)
1:2:1
b)
1:2:2
c)
2:1:1
d)
2:2:1
67.
Red flower (R) color is dominant to white flower (r) color in rose plants. What is the expected phenotypic results of a cross between two heterozygous (Rr) rose plants?
a)
100% red
b)
75% red, 25% white
c)
50% red, 50% white
d)
75% white, 25% red
68.
The letters that represent the different forms of a gene.
a)
trait
b)
hetrozygous
c)
homozygous
d)
alleles
69.
The passing of physical characteristics from parent to offspring.
a)
Genetics
b)
Heredity
c)
Science
d)
Cloning
70.
The trait that hide in the background (lower case), can only be expressed in homozygous form (ex: hh)
a)
dominant
b)
recessive
c)
heterozygous
d)
carrier
71.
The trait that overshadows and is expressed (capital letter).
a)
dominant
b)
recessive
c)
heterozygous
d)
hybrid
72.
Two alleles/letters for one trait that are the same (Ex: DD or dd)
a)
Homozygous
b)
Heterzygous
c)
Carrier
d)
Pedigree
73.
Combination of alleles (letters): (ex: Dd)
a)
Homozygous
b)
Heterozygous
c)
Purebred
d)
Clone
74.
The physical appearance of a trait (Ex: dimples, no dimples)
a)
Genotype
b)
Phenotype
c)
Trait
d)
Quality
75.
Which of the following is a trait that you probably inherited?
a)
your taste in clothing
b)
your musical talent
c)
your athletic ability
d)
your hair color
76.
Tongue rolling is dominant to no tongue rolling. Ava's mom is heterozygous for tongue rolling and his dad is homozygous dominant for the trait. What genotypes can result from the cross of Ava's parents?
a)
RR, rr
b)
RR, Rr
c)
RR, Rr, rr
d)
all Rr
77.
A ________________________ is used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
78.
What is a dominant allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
79.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
80.
How many are tall?
a)
0
b)
1
c)
2
d)
4
81.
What is the only Genotype that shows the RECESSIVE Phenotype?
a)
GG
b)
Gg
c)
gg
82.
What are the two genotypes that show the DOMINANT Phenotype
a)
GG, gg
b)
GG, Gg
c)
Gg, gg
83.
What is Bb?
a)
Homozygous
b)
Heterozygous
c)
Recessive
d)
Alleles
84.
One trait that is ALWAYS present and causes the other traits to disappear is a...
a)
recessive trait.
b)
aggressive trait.
c)
George trait.
d)
dominant trait.
85.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
86.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
87.
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
88.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
89.
What is a segment of DNA called?
a)
Chromosome
b)
gene
c)
dominant trait
d)
nucleus
90.
Why do sexually reproducing organisms look like their parents?
a)
Boys look more like their dads and girls look more like their moms
b)
They get half of their genetic material from one parent and half from the other parent
c)
They get more genetic material from the parent they most resemble
d)
They only get genetic material from one parent
91.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
92.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
93.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
94.
You get your genes from:
a)
Department Store
b)
Parents
c)
Aunt
d)
Neighbor
95.
The physical appearance of a gene:
a)
Genotype
b)
Heredity
c)
Phenotype
d)
Allele
96.
Homozygous or heterozygous?
BB
BB
a)
Homozygous
b)
Heterozygous
97.
Genes are unable to determine a person's
a)
eye color
b)
athletic ability
c)
shape of ears
d)
type of chin
98.
A father's genotype is BB, and a mother's is Bb. Which statement describes their offspring?
a)
They will have the same genotype and phenotype.
b)
The phenotypes will be the same, but the genotypes will be different.
c)
The genotypes will be the same, but the phenotypes will be different.
d)
Both genotypes and phenotypes will be different
99.
White hair (W) is dominant in horses, and non-white (w) is recessive. A dominant WW horse is crossed with a recessive ww horse, as shown in the Punnett square. What percentage of offspring would have white hair?
a)
0%
b)
50%
c)
75%
d)
100%
100.
Round seeds (R) are dominant to wrinkled seeds (r) in pea plants. If two heterozygous parents are crossed as shown above, what percentage of offspring would have round seeds?
a)
0%
b)
50%
c)
75%
d)
100%
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