wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Mendel and Heredity

Total questions: 85

Worksheet time: 51mins

Name
Class
Date
1.

When the two alleles of a particular gene are different (Ex. Hh):

a)

heterozygous

b)

homozygous

c)

genotype

d)

phenotype

2.

The set of alleles that an individual has:

a)

heterozygous

b)

phenotype

c)

homozygous

d)

genotype

3.

The allele that is fully expressed by itself:

a)

recessive

b)

homozygous

c)

dominant

d)

heterozygous

4.

A diagram used to predict the outcomes of a genetic cross:

a)

karyotype

b)

Punnett Square

c)

Pedigree

d)

Venn diagram

5.

The allele that is not expressed when the dominant corresponding allele is present:

a)

dominant

b)

heterozygous

c)

recessive

d)

homozygous

6.

A version of a gene:

a)

allele

b)

trait

c)

character

d)

generation

7.

A family history that shows how a trait is inherited:

a)

karyotype

b)

Punnett square

c)

pedigree

d)

hybrid

8.

When the two alleles of a particular gene are the same:

a)

homozygous

b)

genotype

c)

heterozygous

d)

phenotype

9.

Known as the father of modern genetics:

a)

Watson

b)

Crick

c)

Darwin

d)

Mendel

10.

Dominant alleles are represented with a:

a)

capital letter

b)

lower case letter

c)

shape

d)

symbol

11.

A detectable/observable trait or traits that result from the genotype such as color, shape, etc:

a)

genotype

b)

homozygous

c)

heterozygous

d)

phenotype

12.

Group of offspring produced by a given set of parents:

a)

generation

b)

family

c)

characters

d)

partners

13.

An inherited disease:

a)

karyotype

b)

pedigree

c)

genetic disorder

d)

phenotype

14.

The passing of genetic traits from parents to offspring:

a)

geneology

b)

heredity

c)

cellology

d)

physiology

15.

Gregor Mendel experimented on what kind of plants?

a)

Lilacs

b)

Peas

c)

Apples

d)

Sunflowers

16.

The passing of physical characteristics from parent to young is called...

a)

Traits

b)

Alleles

c)

Heredity

d)

Hybrid

17.

What is the scientific study of heredity?

a)

Genetics

b)

Epistemology

c)

Pathology

d)

Podiatry

18.

Organisms with 2 different alleles for a trait is known as...

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Hybrid

19.

A ___________ is the genetic makeup or allele combination.

a)

Phenotype

b)

Gene

c)

Genotype

d)

Homozygous

20.

When the genotype has 2 identical alleles (Ex. hh or HH) it is known as...

a)

Heterozygous

b)

Co-dominance

c)

Homozygous

d)

Recessive

21.

A __________ is the visible trait or physical appearance.

a)

Genotype

b)

Dominant

c)

Co-dominance

d)

Phenotype

22.

A chart or tool that shows all the possible combinations of alleles that can result from a genetic cross.

a)

Punnett Square

b)

Genetic Calculator

c)

Family Tree

d)

Blood Sequence

23.

What allele will always show up when present in the genetic combination?

a)

Recessive

b)

Purebred

c)

Traits

d)

Dominant

24.

Heterozygous is when the alleles are neither dominant or recessive.

a)

True

b)

False

25.

Dominant alleles are represented as lowercase letters on a Punnett Square.

a)

True

b)

False

26.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
27.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
28.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
29.
If something is heterozygous, it is also...
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
30.
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
31.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
32.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
33.
 Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
34.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
35.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
36.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
37.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
38.
What is the cause of some traits "skipping" a generation?
a)
dominant traits
b)
recessive traits
c)
hybrid alleles
d)
homologous chromosomes
39.
When is a recessive allele expressed in offspring?
a)
when two copies are present
b)
when parents have no dominant alleles
c)
when the offspring is heterozygous
d)
when one copy is present
40.
Mendel's law of segregation states that during meiosis, the alleles that control each trait separate, and only _________________ from each pair is/are passed to the offspring
a)
one allele
b)
the dominant trait
c)
two alleles
d)
the recessive trait
41.
Which of the following is NOT a trait you can inherit?
a)
your athletic ability
b)
your eye color
c)
your hairstyle
d)
your height
42.
Meiosis produces cells with how many chromosomes
a)
44
b)
22
c)
46
d)
23
43.

Blonde hair is a....

a)

Trait

b)

Genotype

c)

Gene

44.

Genes are inherited in pairs, one from each parent.

a)

True

b)

False

45.

Alleles are different forms of a gene.

a)

True

b)

False

46.

A dominant trait:

a)

will block a recessive trait

b)

is shown with a capital letter

c)

requires two letters

d)

is better

47.

Which of these is heterozygous?

a)

Hh

b)

HH

c)

hh

d)

None of these

48.

HH is

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous

d)

neither dominant nor recessive

49.

hh is

a)

homozygous recessive

b)

homozygous dominant

c)

heterozygous

d)

neither dominant nor recessive

50.

If long hair (H) is dominant to short hair (h), what is the phenotype of Hh?

a)

Long hair

b)

Dominant

c)

Medium hair

d)

Recessive

51.

Aa is a:

a)

genotype

b)

phenotype

c)

homozygous

d)

allele

52.

How a trait appears is a

a)

phenotype

b)

genotype

c)

gene

d)

dominant

53.

The two alleles that determine a phenotype are

a)

a genotype

b)

dominant

c)

recessive

d)

heterozygous

54.

If you know that long hair (H) is dominant to short hair (h) and are shown this picture, can you say if this guinea pig is Hh or HH?

a)

No, Hh and HH have the same phenotype

b)

No, this guinea pig would be hh

c)

Yes, Hh and HH will look different

55.

What is the probability of Aa?

a)

50%

b)

100%

c)

25%

d)

0%

56.

If brown (B) is dominant to blue (b), what are the possible phenotype(s) of this cross?

a)

Brown and blue

b)

Bb and bb

c)

Brown

d)

Bb

57.

These parents are

a)

Homozygous

b)

Heterozygous

c)

The same

d)

Heterozygous

58.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
59.
Dominant or recessive?
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
60.
Emily has brown hair. Which is most likely a true statement about Emily?
a)
Emily’s favorite color is brown.
b)
Emily has a parent with brown hair.
c)
Emily’s older brother has brown hair. 
61.
What should students use to identify the percent chance of a trait being passed down from a parent to its offspring?
a)
a graph
b)
a flow chart
c)
a data table
d)
a Punnett square
62.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
63.
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
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
64.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
65.
What is a phenotype?
a)
The expression of a trait; physical appearance.
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
66.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

67.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

68.

Which of the following genotypes is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

tT

69.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

a)

rr

b)

rR

c)

RR

d)

Rr

70.

What is the likelihood that the offspring will be green (G)?

a)

25%

b)

50%

c)

75%

d)

100%

71.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
72.

Each one of the boxes on the Punnett Square represents what percentage?

a)

25%

b)

1%

c)

10%

d)

0%

73.

AA and Aa will both show up as ___________________ traits.

a)

dominant

b)

recessive

74.

What is the likelihood that the offspring will be yellow?

a)

0%

b)

25%

c)

50%

d)

75%

75.

What is the likelihood that the offspring will be yellow (g)?

a)

25%

b)

50%

c)

75%

d)

100%

76.

What is the likelihood that the offspring will be green?

a)

0%

b)

25%

c)

50%

d)

75%

77.

What is the likelihood that the offspring will have brown eyes (B)?

a)

0%

b)

100%

78.

What is the probability that the offspring will have blue eyes?

a)

25%

b)

50%

c)

75%

d)

100%

79.

If b stands for blue, what is the percentage that the offspring will have blue eyes?

a)

35%

b)

50%

c)

65%

d)

100%

80.

Which trait is dominant?

a)

pink

b)

white

81.

A tall plant (TT) is crossed with a short plant (tt). All of the offspring will be ____________.

a)

tall

b)

short

82.

A tall pine tree (Tt) is crossed with a tall pine tree (Tt). What is the likelihood that an offspring would be tall?

a)

0%

b)

25%

c)

50%

d)

75%

83.

Round seeds are dominant (R). Wrinkled seeds are recessive (r). What is the likelihood that this offspring is round (R)?

a)

0%

b)

25%

c)

50%

d)

75%

84.

Round seeds are dominant (R). Wrinkled seeds are recessive (r). What is the likelihood that this offspring is wrinkled (r)?

a)

0%

b)

25%

c)

50%

d)

75%

85.

Why is DNA important?

a)

it is very small and very complicated

b)

it's in everything that's not alive

c)

it serves as the blueprint for traits of all living things

d)

because we eat it every day for energy

Similar Resources on Wayground

Biology Semester 1 Final Exam

80 questions

Biology Semester 1 Final Exam

quiz

Worksheet

•

9th - 12th Grade

CCHS biology DCA #1

80 questions

CCHS biology DCA #1

quiz

Worksheet

•

9th - 12th Grade

Unit 10: Animalia Kingdom Test Review

90 questions

Unit 10: Animalia Kingdom Test Review

quiz

Worksheet

•

9th - 10th Grade

The Chemistry of Life

85 questions

The Chemistry of Life

quiz

Worksheet

•

9th - 12th Grade

Classification Review

82 questions

Classification Review

quiz

Worksheet

•

9th Grade

Biology Fall Final

80 questions

Biology Fall Final

quiz

Worksheet

•

10th Grade

Human Heredity (H)

90 questions

Human Heredity (H)

quiz

Worksheet

•

9th Grade

Summer Biology STAAR Review

90 questions

Summer Biology STAAR Review

quiz

Worksheet

•

9th - 12th Grade