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Punnett Squares

Total questions: 89

Worksheet time: 2hrs 50mins

Name
Class
Date
1.

A Punnett square is a ​ (a)   that allows you to easily determine the expected ​ (b)   of different ​ (c)   in the ​ (d)   of two parents. An example of a Punnett square for pea plants is shown here. In this example, both parents are ​ (e)   for flower color (Pp).

Choose from the below words
chart
percentage
genotypes
offspring
heterozygous
2.

In a broad sense, the term "genotype" refers to the ​ (a)   of an organism; in other words, it describes an organism's ​ (b)   . In a more narrow sense, the term can be used to refer to the ​ (c)   , or variant forms of a ​ (d)   , that are carried by an organism.

Choose from the below words
genetic makeup
complete set of genes
alleles
gene
3.

The presence of ​ (a)   at a particular ​ (b)   . A ​ (c)   genotype may include one ​ (d)   and one mutated allele or two different mutated alleles (compound heterozygote).

Choose from the below words
two different alleles
gene locus
heterozygous
normal allele
4.

Gene locus is the physical site or location of a specific ​ (a)   on a ​ (b)   .

Choose from the below words
gene
chromosome
5.

We all have two alleles, or versions, of each gene. Being ​ (a)   for a particular gene means you inherited two identical versions. It's the opposite of a ​ (b)   genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.

Choose from the below words
homozygous
heterozygous
6.

The gametes produced by the ​ (a)   are at the top of the chart, and the gametes produced by the ​ (b)   are along the side. The different possible combinations of alleles in their offspring are determined by filling in the cells of the ​ (c)   with the correct letters (alleles). 

 

Choose from the below words
female parent
male parent
Punnett square
7.

A ​ (a)   is a scoring of the type of variant present at a given location (i.e., a locus) in the genome. It can be represented by ​ (b)   . For example, BB, Bb, bb could be used to represent a given variant in a gene.

Choose from the below words
genotype
symbols
8.

​ (a)   are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. ​ (b)   are expressed only if both the connected alleles are recessive.

Choose from the below words
Dominant traits
Recessive traits
9.

Heterozygous are

a)

The same pair of genes

b)

different pair of genes

c)

bb

10.

Recessive genes are

a)

strong genes

b)

weak genes

c)

BB

11.

Homozygous are the

a)

same pair of genes

b)

Cc

c)

different pair of genes

12.

Wrinkle seeds are recessive over Round.


Which pair is a recessive gene?

a)

RR

b)

rr

c)

Rr

13.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
14.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
15.
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
16.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
17.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
18.
 Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
19.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
20.

Is weak, prefers to "hide"

a)

dominant genes

b)

trait

c)

recessive genes

d)

genes

21.

Only takes 1 in a gene pair for a trait to show up

a)

recessive genes

b)

DNA

c)

offspring

d)

dominant genes

22.
The genotype of an organism describes the
a)
codons that make up the genes
b)
number of gene's on the chromosmes
c)
genetic make-up of a trait
d)
type of chromosomes in the nucleus
23.

Which term describes the different forms of a gene

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

24.

Aa, DD, Bb, yy are all examples of _______

a)

genotypes

b)

phenotypes

25.

If something is heterozygous, it is also _____

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

26.

If something is homozygous, it can also be called____

a)

phenotype

b)

genotype

c)

hybrid

d)

purebred

27.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
28.

Who is considered the "father" of modern genetics?

a)

Einstein

b)

Mendel

c)

Disney

d)

Washington

29.

Which of the following alleles is homozygous (purebred) recessive?

a)

TT

b)

Tt

c)

tt

d)

ts

30.
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
31.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
32.
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
33.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
34.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
35.
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%
36.

What is the probability that the offspring will express the dominant trait?

a)

25%

b)

50%

c)

75%

d)

100%

37.
What goes in box 3
a)

Aabb

b)

Abab

c)

AAbb

d)

aaBb

38.

Match the following combinations of alleles:

a)

Homozygous dominant

1.

DD

b)

Homozygous recessive

2.

dd

c)

Heterozygous

3.

Dd

39.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)

Ry

b)

RRyy

c)

RrYy

d)

Rryy

40.
The genotypic percentage resulting from this this cross would be _____________________.
a)
25% blue eye 75 % brown eye 
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
41.
What term describes what you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
42.
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%
43.

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?

a)

0%

b)

25%

c)

50%

d)

75%

44.

What would be the gametes for the YyRr plant?

a)

YR, YR, yR, yR

b)

YR, Yr, yR, yr

c)

Yy, Rr, YY, RR

d)

yy, rr, yy, rr

e)

YR, Yr, yR, yr, Rr, Yy

45.

Jim has type AB blood. His dad could be type O.

a)

True

b)

False

46.

Blood type is determined by the antigens present on the surface of RBCs.

a)

True

b)

False

47.

If one of your parents is blood type A and the other is type B, which of the following blood types could you be?

a)

O

b)

AB

c)

A or B

d)

Any of these

48.
Universal blood donors have type ______ blood.
a)
A
b)
AB
c)
B
d)
O
49.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
50.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb
51.

When you cross two parents, each parent is responsible for passing _______ of their two alleles for each individual trait.

a)

1

b)

2

c)

3

d)

4

52.

Grey (G) fur is dominant to brown (g) fur in mice. What would be the genotype of a mouse that is homozygous dominant?

a)

GG

b)

Gg

c)

gg

d)

GGG

53.

Grey (G) fur is dominant to brown (g) fur in mice. What would be the genotype of a mouse that is heterozygous?

a)

GG

b)

Gg

c)

gg

d)

GGG

54.

Who was Gregor Mendel?

a)

Father of genetics

b)

Father of cells

c)

Coined the term heredity

d)

No one

55.

If Mom is type A, and Dad is type AB, can their kid be type o?

a)

Yes

b)

No

56.

What is Aa

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

d)

Heterozygous dominant

57.

What is aa

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

d)

Heterozygous dominant

58.

True or False: Mendel used pea plants because they grow quickly and have distinctly different colored flowers.

a)

true

b)

false

59.

True or False: Self pollination is when a male plant and a female plant cross pollinate

a)

true

b)

false

60.

Having two different allele forms for a particular gene. Ex. Aa

a)

Heterozygous

b)

Homozygous

c)

Dominant

d)

Recessive

61.

True or False: You can be blood type AB because A and B are co-dominant

a)

true

b)

false

62.

The physical look or the organism, such as brown eyes

a)

genotype

b)

phenotype

c)

Dominant

d)

Recessive

63.
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
64.
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%
65.
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
66.
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
67.

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the genotypic ratio?

a)

1:2:1

b)

2:2

c)

3:1

68.

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the phenotypic ratio?

a)

1:2:1

b)

2:2

c)

3:1

69.

Which of the choices is homozygous recessive?

a)

BB

b)

Bb

c)

bb

70.

Which of the choices is heterozygous?

a)

BB

b)

Bb

c)

bb

71.

Which of the choices is homozygous dominant?

a)

BB

b)

Bb

c)

bb

72.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
73.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
74.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
75.
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
76.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
77.
Natural selection is when ____________ decides who survives and who doesn't
a)
nature
b)
humans
c)
animals
d)
years
78.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
79.
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
80.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
81.

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

82.

Human gametes contain how many chromosomes?

a)

46

b)

23

c)

12

d)

28

83.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous 
84.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
85.
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
86.
"The Great White Shark was 20 feet in length.  Phenotype or Genotype?
a)
phenotype
b)
genotype
87.
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
88.

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

a)

chromosomes

b)

segments

c)

alleles.

d)

homozygous.

89.

Red (R) is dominant over white (r). How can a flower be white?

a)

It can have RR and be white.

b)

It has to have rr.

c)

It has to have rR

d)

There is no way it can be white until the third generation.

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