WorksheetsPunnet Squares
Total questions: 30
Worksheet time: 25mins
In a Punnett square, dominant alleles are represented by a:
no letters
lowercase letter
both lower and upper case letters
capital letter
In a Punnett square, recessive alleles are represented by a:
capital letters
lower case letters
both lower and upper case letters
no letters
The genotype for a yellow plant is...
What percent of offspring from this cross of parents will have the recessive genotype trait?
25%
50%
75%
100%
Both parents in this Punnet square are:
homozygous dominant
homozygous recessive
heterozygous dominant
heterozygous recessive
The dominant phenotype trait is?
yellow pea seeds
green pea seeds
there is no dominant seed
Jolly green giant
To express a recessive trait the offspring must be
homozygous dominant
heterozygous
alleleerific
homozygous recessive
SpongeBob & SpongeSusie are going to have a little precious spongeBaby ; )
What is SpongeSusie's genotype?
Heterozygous dominant
Homozygous dominant
Heterzygous recessive
Homozygous recessive
SpongeBob & SpongeSusie are going to have a little bundle of hideous joy ; )
What is SpongeBob's genotype?
Homozygous dominant
Homozygous recessive
Heterzygous dominant
Heterzygous recessive
What is the pair of (alleles) genotype that fills the missing block in this Punnett square?
Ss
SS
ss
sS
What is the probability that SpongeBob and SpongeSusie will have a yellow skin baby?
100%
75%
25%
50%
Why do scientist use Punnett Squares?
A tool scientist use to to see alleles
A tool scientist use to see which alleles are dominant
A tool scientist use to determine possible genotypes and phenotypes for offspring
A tool to waste people's time.
Which of the following allele pairs is a homozygous recessive genotype?
HH
dd
Aa
AA
Which of the following allele pairs is a heterozygous genotype?
Gg
UU
pp
AA
What genotype (alleles) would go in the yellow block to complete this Punnett square?
AA
Aa
aa
Ai
What genotype (alleles) would go in the yellow block to complete this Punnett square?
Bb
BB
bb
dd
What is the probability that the offspring born from this cross will have a homozygous dominant genotype?
25%
50%
75%
100%
The punnett square is used to tell the color of a frogs skin. "G" green skin is dominant over "g" brown skin, recessive. What is the probability the baby frogs will have brown skin?
0%
25%
50%
100%
What is the other parent's genotype?
DD
Dd
dd
dD
What you see, or the physical appearance of a trait is also called:
Genotype
Phenotype
Homozygous
Heterozygous
T = tall and t = short in the Punnett square, what belongs in the blank corner?
tt
Tt
Bb
TT
This man is the originator of modern genetics.
Mendel
Watson
Crick
McClintok
What is the phenotype and probability of the offspring?
A-Brown hair is a dominant trait
a-blond hair is a recessive trait.
50 % Brown Hair and 50% Blond Hair
25 % Brown Hair and 75% Blond Hair
75 % Brown Hair and 25% Blond Hair
0% Brown Hair and 100% Blond Hair
Tt, tt, tt, tt
TT, TT, TT, Tt
Tt, Tt, Tt, TT
TT, TT, Tt, Tt
Which of the following is a Homozygous Dominant Genotype?
Yy
XX
zz
zY
The alleles that an organism has/inherits are its
genotype
phenotype
chromosome
recessive
