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WorksheetsHeredity and Punnett Squares
Total questions: 41
Worksheet time: 55mins
Name
Class
Date
1.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
2.
___________________________ is the study of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
3.
One trait that is ALWAYS present and causes the other traits to disappear is a ________________________
a)
recessive trait
b)
aggressive trait
c)
absent trait
d)
dominant trait
4.
Offspring receives two sets of _____________ (one from each parent)
a)
blue jeans
b)
genes
c)
machines
d)
pedigree
5.
_____________________ is the appearance of an organism, or how it looks
a)
phenotype
b)
ratio
c)
recessive trait
d)
heredity
6.
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
7.
______________________ is the mathematical chance that something will happen
a)
division
b)
selective breeding
c)
ratio
d)
probability
8.
_____________________ are cells that join to make offspring
a)
speed cells
b)
sex cells
c)
pea cells
d)
pedigree cells
9.
Chromosomes are found in the ____________ of the cell
a)
Chloroplast
b)
Nucleus
c)
Cytoplasm
d)
Mitochondria
10.
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
11.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
12.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
13.
In asexual reproduction there is____ parent(s).
a)
two
b)
one
14.
Are recessive traits shown with capital or lowercase letters?
a)
Capital
b)
Lowercase
15.
When the allele combination is a dominate and a recessive trait together which trait will be seen?
a)
Dominate
b)
Recessive
c)
none
d)
both
16.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
17.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
18.
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
19.
T = tall an t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
20.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
21.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
22.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
23.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
24.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
25.
Homozygous or heterozygous?
BB
BB
a)
Homozygous
b)
Heterozygous
26.
Which of the following pairs is homozygous dominant?
a)
Hh
b)
pp
c)
HH
d)
aa
27.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
28.
If one parent is homozygous dominant, what are the chances of them having an offspring that shows the recessive trait?
a)
100%
b)
25%
c)
50%
d)
0%
29.
Round seeds (R) are dominant to wrinkled seeds (r) in pea plants. If two heterozygous parents are crossed as shown above, what percentage of offspring would have round seeds?
a)
0%
b)
50%
c)
75%
d)
100%
30.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
31.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
32.
AA and Aa always show up as
a)
dominant
b)
recessive
33.
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
34.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
35.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
36.
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
37.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
38.
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
39.
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
40.
Two heterozygous red flower (white flowers are recessive) are crossed. What is the phenotype?
a)
75% red and 25% white
b)
25% red and 75% white
c)
100 White
d)
50% red 50% red
41.
A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).
a)
100 % tan
b)
100 % brown
c)
50 % brown and 50% tan
d)
75 % brown and 25 % tan
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