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Genetics (Vocab/Punnett Sqaures)

Total questions: 84

Worksheet time: 3625secs

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.

The man who discovered genetics by studying pea plants is

a)

Watson

b)

Crick

c)

Mendel

d)

Darwin

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.

What percent of offspring here will be heterozygous?

a)

25%

b)

50%

c)

75%

d)

100%

5.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
6.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
7.

The passing of genetic traits from parent to offspring.

a)

heredity

b)

trait

c)

gene

d)

allele

8.

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

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

9.

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

a)

protein

b)

homozygous

c)

heterozygous

d)

genotype

10.
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
11.
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%
12.
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
13.
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
14.

Which of the following genotypes is homozygous recessive?

a)

Bb

b)

GG

c)

bb

d)

Dd

15.
What is the definition of phenotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles
c)
A gene on the DNA strand
16.
What is the definition of genotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles 
c)
the genes on a DNA strand
17.

One form of a gene is called_______________

a)

a DNA

b)

a phenotype

c)

a trait

d)

an allele

18.

What is the only way a recessive trait will show?

a)

AA

b)

Aa

c)

aa

19.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
20.

What is the percentage of offspring that have brown eyes?

a)

100%

b)

75%

c)

50%

d)

25%

21.

Which of the following is a genotype?

a)

Bb

b)

Black fur

22.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
23.

In this punnett square, which is the dominant trait?

a)

purple flower

b)

white flower

c)

phenotype

d)

genotype

24.
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
25.

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

26.
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
27.
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%
28.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
29.
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
30.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
31.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
32.

Which is heterozygous ?

a)

Tt

b)

TT

33.
Which is homozygous ?
a)
Zz
b)
SS
34.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
35.
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
36.

The chance of something happening is known as

a)

dominant

b)

genotype

c)

phenotype

d)

probability

37.

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

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

38.

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

a)

protein

b)

homozygous

c)

heterozygous

d)

genotype

39.

A characteristic that an organism can pass on to its offspring through its genes

a)

protein

b)

trait

c)

DNA

40.

The capital letter represents the ________ allele.

a)

dominant

b)

recessive

41.

The lowercase letter represents the _______ allele.

a)

dominant

b)

recessive

42.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
43.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. 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
44.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
45.
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
46.

Punnett Squares are used to predict the probability of inheriting traits.

a)

True

b)

False

47.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
48.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
49.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
50.
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
51.
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%
52.
Which of the following is NOT a genotype?
a)
heterozygous
b)
a trait
c)
Bb
d)
homozygous recessive
53.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
54.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
55.
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)
56.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
57.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
58.
AA and Aa always show up as
a)
dominant
b)
recessive
59.
aa always shows up as
a)
dominant
b)
recessive
60.
Aa is
a)
homozygous
b)
heterozygous
61.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
62.
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
63.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
64.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
65.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
66.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
67.
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
68.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
69.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender 
d)
all of the above
70.

What does inherit mean?

a)

hermit crab

b)

pass down from a parent

c)

hair product

d)

a unit

71.

What is genetics?

a)

The study of heredity

b)

A pair of genes

c)

A book

d)

A major in college

72.

Who is the "father of genetics"?

a)

Howie Mendel

b)

Gregor Mendel

73.

Pick the two types of traits

a)

Rare

b)

Dominant

c)

Recessive

d)

Common

74.

Pick the examples of Phenotypes

a)

Straight hair

b)

Brown eyes

c)

Rr

d)

TT

75.

Pick all of the Genotypes

a)

Dimples

b)

Pp

c)

Right handed

d)

YY

76.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
77.
Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?
a)
BB
b)
Bb
c)
bb
d)
All of the above
78.
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
79.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
80.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
81.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
82.
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
a)
AA
b)
Aa
c)
aa
d)
brown fur
83.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
84.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%

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