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WorksheetsPunnett Squares
Total questions: 50
Worksheet time: 1hrs 16mins
Name
Class
Date
1.
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
2.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
3.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
4.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
5.
Brown is dominant to green. What is the probability of these parents having green offspring?
a)
1/4
b)
2/4
c)
3/4
d)
4/4
6.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
7.
To be a yellow seed genotype must be
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
8.
To express the recessive trait you must be
a)
homozygous dominant
b)
heterozygous
c)
alleleerific
d)
homozygous recessive
9.
A Punnet Square will
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
10.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
11.
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
12.
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
13.
Both parents in this Punnet square
a)
are homozygous dominant
b)
are homozygous recessive
c)
are heterozygous
d)
have blue eyes
14.
An allele that is hidden when the dominant allele is present.
a)
Dominant Allele
b)
Gene
c)
Recessive Allele
d)
Probability
15.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
16.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
17.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
18.
BB, Bb, and bb are examples of _________________
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
19.
bb is a _________________ genotype
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
20.
In some animals, brown eyes (B) are dominant over blue eyes (b). Which of these genotypes will complete the Punnett Square to the right?
a)
B
b)
bb
c)
Bb
d)
BB
21.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
22.
What percent of offspring will have the recessive trait?
a)
25
b)
50
c)
75
d)
100
23.
The passing of traits from parent to offspring
a)
Heredity
b)
Genetics
c)
Hybrid
d)
Probability
24.
The study of heredity and the variation of inherited characteristics
a)
gene
b)
genetics
c)
meiosis
d)
hybrid
25.
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
26.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
27.
The "Father of Genetics"
a)
Einstein
b)
Newton
c)
Mendel
28.
This trait Will NOT be expressed when a dominant trait is also present (Tt)?
a)
Dominant
b)
Recessive
29.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
30.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
31.
which is heterozygous ?
a)
Tt
b)
TT
32.
Which is homozygous ?
a)
Zz
b)
SS
33.
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%
34.
Chromosomes are made of
a)
DNA
b)
RNT
c)
WWE
d)
DMA
35.
A segment found on DNA is called a ______.
a)
Gene
b)
Jean
c)
Billie Jean
d)
Chromosome
36.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
a)
50 % Brown Hair and 50% Blond Hair
b)
25 % Brown Hair and 75% Blond Hair
c)
75 % Brown Hair and 25% Blond Hair
d)
0% Brown Hair and 100% Blond Hair
37.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
38.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
39.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
40.
Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?
a)
b)
c)
d)
41.
Genotype refers to
a)
a person's physical appearance
b)
a person's genetic makeup
c)
a person's cells
d)
one person's parent
42.
Phenotype refers to
a)
a person's physical appearance
b)
a person's genetic makeup
c)
a person's cells
d)
one person's parent
43.
Which genotype is heterozygous?
a)
Hh
b)
HH
c)
hh
d)
hhHh
44.
Which genotype is homozygous dominant?
a)
BB
b)
Bb
c)
bb
d)
Cc
45.
Which genotype is homozygous recessive?
a)
BB
b)
Bb
c)
bb
d)
Cc
46.
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%
47.
What about the dog in the picture is an inherited trait?
a)
The dog has a scar on its nose.
b)
The dog is paying attention.
c)
The dog is sitting.
d)
The dog has curved ears.
48.
The genotypic ratio here is
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
49.
What is the chance of homozygous recessive offspring?
a)
0
b)
25
c)
50
d)
75
50.
In the problem shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
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