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Genetics Junior

Total questions: 194

Worksheet time: 4hrs 53mins

Name
Class
Date
1.

What is a GENOTYPE?

a)

the genetic make-up of an organism

b)

the physical trait of an organism

c)

mitosis

d)

meiosis

2.

Which of the following are GENOTYPES? (select all correct answers)

a)

black hair

b)

homozygous dominant

c)

heterozygous

d)

blue eyes

e)

BB

3.

PHENOTYPE is

a)

the genetic make-up of an organism

b)

the physical trait of an organism

c)

nucleic acid

d)

Aa

4.

Which of the following are PHENOTYPES?

a)

green skin

b)

Aa

c)

homozygous recessive

d)

purple eyes

e)

black fur

5.

The prefix "hetero" means

a)

different

b)

ugly

c)

fancy

d)

same

6.

Which of the following represents alleles for the homozygous dominant genotype?

a)

Aa

b)

aa

c)

AA

7.

Which of the following represents alleles for the heterozygous genotype?

a)

Aa

b)

aa

c)

AA

8.

If A = red fur and a = white fur, what color fur would Aa be?

a)

red

b)

white

c)

purple

d)

blue

9.

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

10.

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

11.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
12.
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
13.
This type of allele masks the recessive allele and is capital ________________
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
14.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
15.
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
16.

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring of a cross between two homozygous recessive parents? (Hint: Make a Punnet Square)

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

17.

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring of a cross between a homozygous dominant parent and heterozygous parent? (Hint: Make a Punnet Square)

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

18.

A heterozygous tall pea plant (Tt) is crossed with a short pea plant (tt).


Perform a punnett square cross and determine the Genotype & %. (if this isn't familiar, re-watch this week's videos!)

a)

100% Tt

b)

50% Tt, 50% tt

c)

75%Tt, 25%tt

d)

25%TT, 50%Tt, 25%tt

19.

What are the possible genotypes for this cross? And what percentage of each is produced? (if this isn't familiar, re-watch this week's videos!)

a)

TT = 25% Tt= 50% tt=25%

b)

all tall

c)

TT= 75% tt = 25%

d)

Tt = 100%

20.
How many total chromosomes do humans have?
a)
44
b)
23
c)
46
d)
50
21.
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%
22.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
23.
If brown eyes are dominant over blue eyes, what would be the  parent genotypes if two heterozygous brown eyed persons were crossed?
a)
BB and bb
b)
BB and Bb
c)
Bb and Bb
d)
bb and Bb
24.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

a)

Incomplete Dominance

b)

Codominance

c)

Independent assortment

d)

Recessive inheritance

25.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
26.

This type of inheritance pattern shows BOTH traits in possible offspring

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

dominant pattern

27.
A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).
a)
50% heterozygous and 25% homozygous recessive
b)
50% heterozygous and 50% homozygous recessive
c)
100% homozygous recessive
d)
25% heterozygous and 50% homozygous
28.
A white flower (rr) is crossed with a white flower (rr). What is the genotype of the offspring? Draw a Punnett square and answer the question.
a)
100% homozygous dominant
b)
100% heterozygous dominant
c)
100% homozygous recessive
d)
100% heterozygous recessive
29.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
30.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
31.

The physical appearance of a trait is known as the-

a)

genotype

b)

phenotype

c)

Homozygous

d)

intelligence

32.

Gretford is heterozygous for his head shape. If (R) is for a Round head, and (r) is for an Egg head, what is Gretford's genotype?

a)

RR

b)

Rr

c)

rr

d)

rR

33.

What is the probability of heterozygous offspring?

a)

25%

b)

50%

c)

0%

d)

100%

34.

In plants, tall (T) is dominant to short (t).


Draw a punnett square and perform the following cross: Tt x Tt


What is the probability of producing a short plant?

a)

0%

b)

25%

c)

50%

d)

75%

35.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
36.

What genotype would go in box 2? And is it Homozygous or Heterozygous?

a)

BB Heterozygous

b)

Bb Heterozygous

c)

bb Homozygous

d)

Bb Homozygous

37.

Kyree is heterozygous. If (W) is for waves, and (w) if for no waves.


What is Kyree’s genotype & phenotype?

a)

WW : waves

b)

ww : waves

c)

Ww : no waves

d)

Ww : Waves

38.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
39.

Brown eye color is dominant to blue eyes. 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%

40.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
41.
The physical appearance or the way a gene looks is known as it's....
a)
genotype
b)
allele
c)
gene
d)
phenotype
42.
The mathematical chance that something will happen is known as...
a)
chance
b)
luck
c)
probability
43.
The different forms of genes are known as
a)
environment
b)
probability
c)
traits
d)
alleles
44.
An allele or gene that always shows is
a)
recessive
b)
dominant
c)
hidden
d)
present
45.
Two of the same genes for a trait (sometimes called purebred). BB or bb
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
46.
Two different genes for a trait (sometimes called hybrid). Bb
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
47.
What would the ratio for genotypes be for this Punnett Square?
a)
2Bb:2bb
b)
2BB:2Bb
c)
1BB:2Bb:1bb
d)
4Bb
48.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
49.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
50.
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
51.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
52.
___________________________ is the field of science that studies of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
53.
He is known as the father of modern day genetics.
a)
Gregory Mendel
b)
Greg Mendel
c)
Gregor Mendel
d)
Grace Mendel
54.
Which is a true statements about this picture?
a)
Brown is recessive
b)
Brown is dominant
c)
Blue is dominant
d)
Blue is codominant
55.
What are the possible phenotypes in this punnett square?
a)
Bb, bb, BB
b)
purple, white
c)
Bb, bb
d)
light purple
56.
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
57.
What is a genotype? 
a)
The genetic make up (code)
b)
The physical trait
58.
Tall is dominant to short. What is the phenotype of this organism?
Tt
a)
tall
b)
short
59.
Are recessive traits shown with capital or lowercase letters? 
a)
Capital
b)
Lowercase
60.
G = dominant green and y = recessive yellow
A fish has a Gy genotype, what will its phenotype be?
a)
yellow
b)
green
c)
greenish-yellow
d)
red
61.
If T stands for tall and t stands for short, which is true of this Punnett Square?
a)
50% of the offspring are short
b)
50% of the offspring are tall
c)
100% of the offspring are tall
d)
100% of the offspring are short
62.
Which is correct?
a)
Genotypes describe alleles, phenotypes describe physical appearance
b)
Phenotypes describe alleles, genotypes describe physical appearance
c)
Homozygous recessive is a type of phenotype
d)
Genotypes are the same thing as phenotypes
63.
What type of Punnett Square is this?
a)
Monohybrid Cross
b)
Dihybrid Cross
c)
Trihybrid Cross
d)
Criss Cross
64.
What determines your traits?
a)
Your father's genes
b)
Your environment
c)
The type of nutrition you get
d)
The sequence of bases in your DNA
65.
Which is true of this Punnett Square?
a)
All of the offspring are homozygous dominant
b)
The parents had 4 children
c)
The H stands for Horse genes
d)
One of the parents is heterozygous
66.
If the R stands for round peas and the r stands for wrinkled peas, which of the following is true?
a)
1 out of 4 (50%) of the offspring are round
b)
1 out of 4 (50%) of the offspring are wrinkled
c)
4 out of 4 (100%) of the offspring are round
d)
4 out of 4 (100%) of the offspring are wrinkled
67.
Who was Gregor Mendel?
a)
The guy who discovered DNA
b)
The guy who discovered Science
c)
The guy who discovered Genetics
d)
The guy who discovered Biology
68.
Which of the following would be homozygous recessive?
a)
Zz
b)
nn
c)
MM
d)
LMNOP
69.
What is the genotype for this?  AA
a)
Homozygous recessive
b)
Homozygous dominant
c)
Heterozygous
d)
Other
70.
What is this?
a)
Allele
b)
Chromosome
c)
Gregor Mendel
d)
Punnett Square
71.

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

a)

recessive

b)

dominant

c)

both

72.

Which of the following genotypes is homozygous dominant?

a)

aa

b)

Aa

c)

AA

73.
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
74.

Which of the following genotypes is heterozygous?

a)

Bb

b)

BB

c)

bb

75.

Which of the following alleles is purebred recessive?

a)

Tt

b)

tt

c)

TT

76.

Two brown eyed parents (Bb) have a baby. What is the chance their baby is blue eyed?

a)

0 %

b)

25%

c)

50%

d)

75%

77.

Aa, DD, Ba, and yy are all examples of ---

a)

genotypes

b)

phenotypes

78.

Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?

a)

25%

b)

50%

c)

75%

d)

100%

79.

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

a)

0%

b)

25%

c)

50%

d)

75%

80.

The blending of two traits is known as ---

a)

incomplete dominance

b)

codominance

81.

A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---

a)

Codominance

b)

Incomplete dominance

82.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
83.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
84.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

a)

Incomplete dominance

b)

Codominance

85.

This is an example of ---

a)

Incomplete dominance

b)

Codominance

86.

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

a)

Protein

b)

DNA

c)

RNA

d)

Glucose nucleic acid (GNA)

87.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
88.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
89.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
90.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
91.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

92.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

93.

The genotype Aa is called . . .

a)

Homozygous recessive

b)

Hybrid

c)

Purebred

d)

Homozygous dominant

94.

Which of the following would be a phenotype?

a)

Aa

b)

red hair

c)

heterozygous

d)

DNA

95.

Which of the following genotypes are Purebred? Select 2 answers.

a)

aA

b)

Aa

c)

AA

d)

aa

96.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
97.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

98.

Which of the following genotypes is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

tT

99.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

a)

rr

b)

rR

c)

RR

d)

Rr

100.

Which of these characteristics would not be passed on to its offspring?

a)

fur color

b)

length of tail

c)

scars on leg

d)

body size

101.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

102.

How many alleles are in the genotype for a simple trait?

a)

1

b)

2

c)

3

d)

4

103.

How many alleles (letters) does a child get from EACH parent for each trait?

a)

1

b)

2

c)

3

d)

4

104.

Who is considered the "father of genetics"?

a)

Reginald Punnett

b)

Gregor Mendel

c)

James Watson

d)

Charles Darwin

105.

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

106.

Which of the following could represent a recessive allele? (check all that apply)

a)

b

b)

h

c)

D

d)

L

107.

Which of the following could represent a dominant allele? (check all that apply)

a)

B

b)

c

c)

R

d)

n

108.

Which one is a homozygous dominant pair?

a)

BB

b)

dd

c)

Ff

109.

Which one is a heterozygous pair?

a)

BB

b)

Dd

c)

ff

110.

Which one is a homozygous recessive pair?

a)

BB

b)

dd

c)

Ff

111.

Which one represents a genotype?

a)

BB

b)

Brown

112.

Which one represents a phenotype?

a)

BB

b)

Brown

113.

A genetic factor that blocks another genetic factor

a)

Punnett Square

b)

Dominant trait

c)

recessive trait

d)

genetics

114.

The passing of traits from parents to offspring

a)

phenotype

b)

genotype

c)

heredity

d)

heterozygous

115.

The study of how traits are passed from parent to offspring.

a)

Punnett Square

b)

Dominant trait

c)

recessive trait

d)

genetics

116.

A model that is used to show the probability of all possible genotypes and phenotypes of offspring.

a)

Punnett Square

b)

Dominant trait

c)

recessive trait

d)

genetics

117.

the alleles of all the genes on an organism's chromosomes; controls an organism's phenotype.

a)

phenotype

b)

genotype

c)

heredity

d)

heterozygous

118.

a genotype in which the two alleles of a gene are different.

a)

phenotype

b)

genotype

c)

heredity

d)

heterozygous

119.

a genetic factor that is blocked by the presence of a dominant factor.

a)

Punnett Square

b)

Dominant trait

c)

recessive trait

d)

genetics

120.

The physical expression of a gene

a)

phenotype

b)

genotype

c)

heredity

d)

heterozygous

121.

What are the genotypes of the offspring? (click all that apply)

a)

AA

b)

Aa

c)

aa

122.

What percentage of offspring are heterozygous?

a)

0

b)

25

c)

50

d)

75

e)

100

123.

What percentage of offspring are homozygous?

a)

0

b)

25

c)

50

d)

75

e)

100

124.

If A is dominant and represents tall, how many off spring would be short?

a)

1

b)

2

c)

3

d)

4

125.

Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a white offspring in a cross between two heterozygous guinea pigs.

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

126.

Fluffy tail (F) in dogs is dominant over thin tail (f). What is the probability of having a heterozygous offspring with a Homozygous dominant parent and a heterozygous parent?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

127.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
128.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
129.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
130.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
131.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
132.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
133.
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
134.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
135.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
136.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
137.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
138.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
139.
In this punnett square, which is the dominant trait?
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
140.
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?
a)
none
b)
3/4
c)
1/2
d)
all
141.
The study of heredity and the variation of inherited characteristics 
a)
gene
b)
genetics 
c)
meiosis 
d)
hybrid 
142.
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%
143.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
144.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
145.
What is heredity?
a)
A kind of genetic disorder
b)
The way DNA divides
c)
A trait you inherit from your parents
d)
The passing down of traits from parents to children
146.
What is the relationship between DNA and chromosomes?
a)
Chromosomes are made of DNA
b)
DNA is made of chromosomes
c)
DNA and chromosomes are the same thing.
d)
All of the above are correct
147.
How many pairs of chromosomes exist in each of your cells?
a)
10
b)
12
c)
23
d)
46
148.
Why are your chromosomes arranged in pairs?
a)
Scientists have no idea
b)
Because you get one from your mom and one from your dad
c)
Because pairs can divide easier
d)
Because DNA is awesome
149.
What law states that in Tt the person will only show the dominant allele
a)
law of segregation
b)
law of independent assortment
c)
law of dominance
d)
law of punnett squares
150.

Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?

a)

Purebred

b)

Heterozygous

c)

Homozygous

d)

Sex-linked

151.
Genotype refers to the ...
a)

physical expression of the genes in an organism

b)

the possible combination of alleles or genes an organism has

c)

whether an allele is dominant or recessive

d)

how an organism will appear overall

152.
What is a phenotype
a)

The genetic make up (code)

b)

The physical expression of a gene

c)

The alleles

d)

The genes an organism has in their DNA

153.

Having two of the same genes for the trait (sometimes called purebred).

a)

homozygous

b)

hetrozygous

c)

hybrid

d)

chromosome

154.

Having two different genes for a trait (sometimes called hybrid).

a)

purebred

b)

homozygous

c)

heterozygous

d)

genotype

155.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
156.

Who is considered the "father" of modern genetics?

a)

Einstein

b)

Mendel

c)

Disney

d)

Washington

157.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
158.

Y for yellow body is dominant over y for blue body.  What genotypes would produce yellow bodies?

a)

YY, yy

b)

Yy, yy

c)
YY only
d)

YY, Yy

159.

"The Great White Shark was 20 feet in length. "  Phenotype or Genotype?

a)
phenotype
b)
genotype
160.

Females - XX; Males - XY.  A couple has 4 girls.  What is the chance the next child will be a boy?

a)
75%
b)
100%
c)
25%
d)
50%
161.

Alternant or different genes that code for the same trait are called?

a)

chromosomes

b)

segments

c)

alleles.

d)

homozygous.

162.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
163.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
164.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
165.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
166.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
167.

Which law states that during meiosis the homologous chromosomes or alleles for each trait are separated into different gametes?

a)

Law of Dominance

b)

Law of Punnett Squares

c)

Law of Segregation

d)

Law of Independent Assortment

168.

Most sex-linked traits are found on which sex chromosome?

a)

X

b)

Y

c)

equally both the X and the Y chromosome

169.
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
170.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
171.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
172.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
173.
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%
174.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
175.
Hereditary information is stored inside the
a)
ribosomes, which have chromosomes that contain many genes
b)
ribosomes, which have genes that contain many chromosomes
c)
nucleus, which has chromosomes that contain many genes
d)
nucleus, which has genes that contain many chromosomes
176.

What's the probability an offspring will have the dominant Brown Eyes in this Punnett Square

a)

25%

b)

50%

c)

75%

d)

100%

177.

Why does Scar have a scar but his brother Mufasa does not?

a)

Mufasa did not inherit it

b)

The scar gene skipped a generation

c)

The scar is an environmental trait

d)

Mufasa is not his brother

178.

If brown eyes are dominant and blue eyes are recessive, what color eyes do the parents in this Punnett Square have?

a)

one has brown eyes and the other has blue eyes

b)

they both have blue eyes

c)

they both have brown eyes

d)

there's no way to tell based on this information

179.

Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?

a)
b)
c)
d)
180.

In dihybrid crosses, the alleles for the two traits segregate independently of each other when gametes are formed. So when looking at a parent with two traits there are four possible combinations when gametes are formed.

a)

Heterozygous

b)

The Law of Independent Assortment

c)

Molecular genetics

d)

Cross

181.

Having two identical alleles for a given gene; homozygous dominant (RR), homozygous recessive (rr)

a)

Trait

b)

The Law of Segregation

c)

Allele

d)

Homozygous

182.

What is the probability of obtaining a heterozygous offspring from a homozygous dominant parent and a homozygous recessive parent?

a)

50%

b)

0%

c)

100%

d)

25%

183.

What is the probability of obtaining a heterozygous offspring from two heterozygous parents?

a)

50%

b)

10%

c)

75%

d)

25%

184.

What are recessive traits?

a)

Genetic traits that are only expressed when an individual has one copy of the recessive allele.

b)

Genetic traits that are always expressed regardless of the number of copies of the recessive allele.

c)

Genetic traits that are only expressed in males.

d)

Genetic traits that are only expressed when an individual has two copies of the recessive allele.

185.

What are dominant traits?

a)

Traits that are expressed when an individual has no copies of the dominant allele.

b)

Traits that are expressed when an individual has at least one copy of the dominant allele.

c)

Traits that are expressed when an individual has at least one copy of the recessive allele.

d)

Traits that are expressed when an individual has two copies of the dominant allele.

186.

In dihybrid crosses, the alleles for the two traits segregate independently of each other when gametes are formed. So when looking at a parent with two traits there are four possible combinations when gametes are formed.

a)

Heterozygous

b)

The Law of Independent Assortment

c)

Molecular genetics

d)

Cross

187.
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%
188.
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%
189.
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?
a)
Leonardo
b)
Olivet
c)
Both
d)
Neither
190.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
191.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

192.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

193.

Which of the following genotypes is Purebred? Select 2 answers.

a)

aA

b)

Aa

c)

AA

d)

aa

194.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

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