Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

6.1: Genetics Review Basics

Total questions: 68

Worksheet time: 2hrs 42mins

Name
Class
Date
1.

A segment of DNA that codes for a trait

a)

gene

b)

centromere

c)

chromosome

d)

chromatid

2.

A version or variation of a gene

a)

trait

b)

gene

c)

allele

d)

DNA

3.

Long strands of DNA are wrapped into

a)

DNA

b)

Chromosome

c)

Alleles

d)

Phenotype

4.

The physical expression of a trait.

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

5.

Hair color and eye color are examples of a person's....

a)

recessive traits

b)

dominant alleles

c)

genotype

d)

phenotype

6.

The passing of traits from parents to offspring is known as....

a)

hierarchy

b)

heredity

c)

traits

d)

genetics

7.

What is the definition of Phenotype?

a)

The diagram that shows all the chromosomes of an individual

b)

The combination of alleles that control that an individual has for a particular trait

c)

How many genes on one chromosome

d)

How a trait is expressed (what it looks like or what it does)

8.

Segments of DNA are called _______________________

a)

Genes

b)

Alleles

c)

Traits

d)

Chromosomes

9.
Genes always appear in pairs. Your parents donate ________ allele for every trait.
a)
1
b)
2
c)
23
d)
46
10.

Which of the following is the correct definition for a genotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

11.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics
12.

What are the structures in this image called?

a)

chromosomes

b)

centromere

c)

sister chromatids

d)

chromatin

13.

Two identical alleles for the same trait.

a)

Heterozygous

b)

Homozygous

c)

Dominant

14.

Two different alleles for the same trait.

a)

Heterozygous

b)

Homonzygous

c)

Dominant

15.

The Alleles bb are

a)

Heterozygous

b)

Homozygous Dominant

c)

Homozygous Recessive

16.

The allelles BB are

a)

Heterozygous

b)

Homozygous Recessive

c)

Homozygous Dominant

17.

The Alleles Bb are

a)

Homozygous

b)

Heterozygous

c)

Homozygous Dominant

18.

The physical characteristic an organism inherits from parents

a)

Behavior

b)

Skill

c)

Traits

19.

Which of the following is a Phenotype?

a)

Bb

b)

Brown Eyes

20.

Which of the following is an example of Genotype?

a)

Tt

b)

Tall

21.

Which of the following Genotypes would be considered heterozygous

a)

BB

b)

gg

c)

Ff

d)

TT

22.

If something is heterozygous, it is also _____

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

23.

If something is homozygous, it can also be called____

a)

phenotype

b)

genotype

c)

hybrid

d)

purebred

24.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
25.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
26.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
27.

The following items are examples of __________.

Items: eye color, hair color, height

a)

homozygous alleles

b)

genotype

c)

heterozygous alleles

d)

phenotype

28.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
29.

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed? (B=brown eyes and b=blue eyes)

a)

0 %

b)

25%

c)

50%

d)

75%

30.
In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
31.
In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?
a)
0%
b)
25%
c)
75%
d)
100%
32.
Long tongues (T) are dominant to short tongues in green tree frogs.  What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?
a)
100%
b)
75%
c)
50%
d)
25%
33.
One of the two forms of a gene is called a(n)
a)
genotype
b)
allele
c)
hybrid
d)
trait
34.
When a person has two different alleles for a gene, they are said to be
a)
heterozygous
b)
homozygous
35.
Why is crossing over important?
a)
Increases the number of genes that can be inherited
b)
Increases genetic variation
c)
Decreases the occurrence of genetic diseases
d)
Decreases the number of genes that can be inherited
36.
This process produces four sex cells, each containing half the usual number of chromosomes.
a)
meiosis
b)
mitosis
37.
This is an example of a ______________.
a)
phenotype
b)
genotype
c)
xenotype
d)
base pairs
38.
This is an example of _____________.
a)
phenotype
b)
heliotype
c)
DNA
d)
genotype
39.
The genetic makeup of the flower is _____________
a)
red
b)
heterozygous
c)
homozygous dominant
d)
homozygous recessive
40.
A diagram used to predict an outcome of a cross or breeding experiment.
a)
pedigree
b)
Punnet Square
41.
In this example, the child displays the ________ trait.
a)
dominant
b)
recessive 
42.
A unique molecule that has a twisted ladder shape (double helix).
a)
DNA
b)
Chromatids
c)
base pairs
d)
nitrogen base
43.

A red flower (Rr) is crossed with a white flower (rr). What is the genotypic ratio?

a)

0 RR; 0 Rr: 4 rr

b)

2 RR; 0 Rr: 2 rr

c)

4 RR; 0 Rr: 0 rr

d)

0 RR; 2 Rr: 2 rr

44.

In sheep, the allele for belly fur (A) is dominant to the allele for no belly fur (a): Two sheep with no belly fur mate and produce offspring. What is the percent chance that the offspring will have belly fur?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

45.

In sheep, the allele for belly fur (A) is dominant to the allele for no belly fur (a): A mother that is homozygous dominant for belly fur mates with a heterozygous father. What percent of the offspring will be homozygous dominant for belly fur?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

46.
Tall is dominant to short. A homozygous tall plant is crossed with a short plant. What will be the phenotypes of the offspring?
a)
100% tall
b)
50% tall, 50% short
c)
75% tall, 25% short
d)
25% tall, 75% short
47.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
48.
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
49.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
50.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
51.

Brown hair is dominant over light hair. If a homozygous parent (Aa) is crossed with a heterozygous recessive parent (aa), their children will have...

a)

Only Brown Hair

b)

Only Light Hair

c)

Some brown and some light

52.

In guinnea pigs, black eyes are dominant to red eyes. A male guinnea pig that is heterozygous is crossed with a female that is homozygous recessive. What are the expected phenotypes of their offspring?

a)

Red Eyed and Black Eyed

b)

Only Red Eyed

c)

Only Black Eyed

53.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
54.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
55.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). Which of the following genotypes would appear red (MARK ALL THAT APPLY!)

a)

rr

b)

None of these

c)

RR

d)

Rr

56.

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?

a)

25%

b)

0%

c)

100%

d)

50%

57.

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

58.

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

59.
If the allele for gray fur (G) is dominant to the allele for white fur (g) in mice, What will be the ratio if you cross a heterozygous gray mouse with a white mouse?
a)
3GG : 0Gg : 1gg
b)
2GG : 1Gg : 1gg
c)
1GG : 2Gg : 1gg
d)
0GG : 2Gg : 2gg
60.
If a purebred, normal feathered bird (FF) is crossed with a frizzy-feathered bird (ff) how many different phenotypes would you have? 
a)
1
b)
2
c)
3
d)
4
61.
In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?
a)
0BB : 2Bb : 2bb
b)
1BB : 2Bb : 1bb
c)
2BB : 0Bb : 2bb
d)
2BB : 1Bb : 0bb
62.
 Cell created at the end of meiosis are best known as
a)
somatic cells
b)
gamete cells
c)
skin cells
d)
diploid cells
63.
If human body cells have 46 chromosomes, how many chromosomes will be in gamete cells after meiosis?
a)
92
b)
46
c)
23
d)
12
64.
What is the benefit of the chromosomes lining up in pairs during meiosis?
a)
When the chromosomes line up in pairs, each daughter cell will receive twice the number of chromosomes as the parent cell.
b)
When the chromosomes line up in pairs, each daughter cell will receive half the number of chromosomes as the parent cell.
c)
When the chromosomes line up in pairs, the DNA is protected from damage and cannot mutate.
d)
When the chromosomes line up in pairs, the DNA in each chromosome is exactly the same.
65.
What is being depicted in this picture?
a)
sexual reproduction
b)
anaphase I of meiosis
c)
crossing-over
d)
replication
66.

In hydrangeas, purple (P) is dominant to white (p). Cross two purebred hydrangeas that are purple. What is the genotypic probability?

a)

1 Pp : 1 pp

b)

4 PP : 0

c)

1 PP: 1 Pp

d)

1 Purple

e)

1 Purple: 1 White

67.

Being able to roll your tongue (R) is dominant over not having the ability to roll your tongue (r). Cross two people who are both hybrids. What are the genotypic ratios?

a)

1 RR: 1 Rr

b)

1 RR: 2 Rr: 1 rr

c)

1 Rr: 1 rr

d)

3 Tongue rollers: 1 Non-tongue roller

e)

1 Tongue roller: 1 Non-tongue roller

68.

Huntigton's disease is a genetic disorder caused by a dominant lethal allele. The condition is a progressive breakdown of nerve cells that causes uncontrolled movement. The disorder can be found on the dominant H allele (which is rare... because usually disorders are recessive!). If the father is homozygous dominant for the trait and the mother does not have the trait, what is the phenotypic probability for their children?

a)

1 HH: 1 Hh

b)

1 Hh : 1 hh

c)

1 HH: 2 Hh: 1 hh

d)

1 Have Huntington's: 1 Doe not

e)

4 Have Huntington's : 0 Do not

Similar Resources on Wayground

Cell parts and functions

63 questions

Cell parts and functions

quiz

Worksheet

•

9th - 12th Grade

Units 9 and 10 review

64 questions

Units 9 and 10 review

quiz

Worksheet

•

9th Grade

Review: Basic Chemistry

66 questions

Review: Basic Chemistry

quiz

Worksheet

•

8th - 10th Grade

DNA

63 questions

DNA

quiz

Worksheet

•

9th - 12th Grade

Cell Types

67 questions

Cell Types

quiz

Worksheet

•

9th Grade

Plant Structure and Function Unit Review

65 questions

Plant Structure and Function Unit Review

quiz

Worksheet

•

9th Grade

Evolution

63 questions

Evolution

quiz

Worksheet

•

9th - 12th Grade

Biology - Fall Semester Exam Review

70 questions

Biology - Fall Semester Exam Review

quiz

Worksheet

•

9th Grade