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Worksheets

Heredity

Total questions: 65

Worksheet time: 1hrs 2mins

Name
Class
Date
1.
What is genetics?
a)
The study of DNA nucleotides
b)
The study of heredity
c)
The study of a cell dividing into 2
d)
The study of eye color
2.
Chromosomes are found in the ____________ of the cell
a)
Chloroplast
b)
Nucleus
c)
Cytoplasm
d)
Mitochondria
3.
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
4.
What is a recessive allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
5.
What is a dominant allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
6.
The physical traits of an organism
a)
Teletype
b)
Genotype
c)
Mesotype
d)
Phenotype
7.
The genes of an organism
a)
Mesotype
b)
Phenotype
c)
Teletype
d)
Genotype
8.
A unit of genetic material that determines a trait
a)
Carrier
b)
DNA
c)
chromosome
d)
Gene
9.
Genes always appear in pairs. Your parents donate ________ allele for every trait.
a)
1
b)
2
c)
23
d)
46
10.
____________________ are used to make predictions about the genotypes and phenotypes of offspring.
a)
Dominant Squares
b)
Punnett Grids
c)
Punnett Squares
d)
Recessive Squares
11.
What are the two genotypes that show the DOMINANT Phenotype
a)
GG, gg
b)
GG, Gg
c)
Gg, gg
12.
What is the only Genotype that shows the RECESSIVE Phenotype?
a)
GG
b)
Gg
c)
gg
13.
Which of the following pairs is homozygous dominant?
a)
Hh
b)
pp
c)
HH
d)
aa
14.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
15.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
16.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
17.

The brown eye trait is dominant over blue eyes. Which of the following genotypes best represents the phenotype for blue eyes?

a)

BB

b)

Bb

c)

bb

d)

bB

18.

The ability to roll your tongue is a dominant trait. If both parents are heterozygous for tongue rolling and they have 8 children together, is it possible that they could have children who are unable to roll their tongues?

a)

Yes

b)

No

19.

What is the genotype for #15?

a)

rr

b)

Rr

c)

RR

d)

rR

20.

What is the genotype for #16?

a)

RR

b)

Rr

c)

rr

d)

rR

21.

A male heterozygous for widow’s peak marries a female without a widow’s peak.


Widow’s peak is a dominant trait (H) not having a widow’s peak is recessive (h).


Use the Punnett Square on Widow's Peal to answer the following question:


What percent of the children will have widow's peak?

a)

25%

b)

50%

c)

75%

d)

100%

22.

Has 2 of the same alleles is __________________.

a)

Genotype

b)

Phenotype

c)

Homozygous

d)

Heterozygous

23.

Has 2 different alleles is _____________________.

a)

Genotype

b)

Phenotype

c)

Homozygous

d)

Heterozygous

24.

An organism that is the offspring of many generations that show the same form of a trait.

a)

Heterozygous

b)

Dominant allele

c)

Purebred

d)

Genotype

25.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
26.

Chromosomes are

a)

Found in the mitochondria

b)

Made of 20 pairs

c)

Long strands of DNA that contain many genes

d)

Bundles of DNA that contain only one gene each

27.

In science, mutations are

a)

The reason the X-Men exist

b)

Genetically engineered creatures that you fight in the Hunger Games

c)

A change in the DNA of an organism that produces new traits

d)

Always helpful for survival

28.

True or false: Mutations only harm chances of survival:

a)

True

b)

False

29.

Which of the following is an example of incomplete dominance?

a)

A red cow and a white bull have a red and white spotted calf.

b)

Human ABO blood types

c)

A red flowering plant and a white flowering plant have pink flowered offspring.

d)

A tall plant and a short plant have tall offspring.

30.

In peas, yellow pod color is dominant to green pod color. Two heterozygous parents are crossed. What are the chances that the offspring will have green pods?

a)

25%

b)

50%

c)

75%

d)

100%

31.

In peas, yellow pod color is dominant to green pod color. Two homozygous dominant parents are crossed. What are the chances that the offspring will have green pods?

a)

0%

b)

25%

c)

50%

d)

75%

32.

In peas, yellow pod color is dominant to green pod color. A heterozygous parent is crossed with a homozygous recessive plant. What are the chances that the offspring will have green pods?

a)

25%

b)

50%

c)

75%

d)

100%

33.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
34.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
35.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
36.
Which shows the correct complementary base pairing for DNA?
a)
C-A, T-G
b)
A-G, C-T
c)
C-G, U-A
d)
T-A, G-C
37.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
38.
What is the shape of a DNA?
a)
Double Helix
b)
Base Pairing
c)
The shape of you
d)
Hydrogen Bonding
39.

If a DNA sequence it GAATGCCT, what are the matching base pairs?

a)

ACGTACCTG

b)

AEIOU and sometimes Y

c)

CTTACGGA

d)

GCCTATGC

40.

If a DNA sequence is CATCAT, what are the matching base pairs?

a)

ACGTAC

b)

MEOW

c)

GTAGTA

d)

GCCTAT

41.

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

a)

Incomplete Dominance

b)

Codominance

42.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

43.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

44.

This is an example of ---

a)

Incomplete dominance

b)

Codominance

45.

What does this Punnett square and the probabilities of the ofspring represent?

a)

incomplete dominance

b)

codominance

46.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
47.
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 
48.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
49.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
50.

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

51.

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

a)

0%

b)

25%

c)

50%

d)

75%

52.

Each one of the boxes on the Punnett square represents what probability of an offspring's genotype?

a)

25%

b)

1%

c)

10%

d)

0%

53.

Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?

a)

25%

b)

50%

c)

75%

d)

100%

54.

Which of the following is a Homozygous Dominant Genotype?

a)

Yy

b)

XX

c)

zz

55.

Why do scientist use Punnett Squares?

a)

A tool scientist use to to see alleles

b)

A tool scientist use to see which alleles are dominant

c)

A tool scientist use to determine possible genotypes for offspring

56.

Which of the following is a homozygous recessive genotype?

a)

HH

b)

dd

c)

Aa

57.

Which of the following is a heterozygous genotype?

a)

Gg

b)

UU

c)

pp

58.

Fill in the Yellow Box

a)

AA

b)

Aa

c)

aa

59.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

60.

What is the mother's genotype?

a)

DD

b)

Dd

c)

dd

61.
Where do mutations occur?
a)
DNA and RNA
b)
DNA 
c)
RNA
d)
mRNA and tRNA
62.

What are the three possible consequences to changes in DNA? [check all that applies]

a)

Improved trait

b)

removal of trait

c)

No change (neutral)

d)

Harmful trait

63.

Selective breeding is...

a)

a process to create an organism with desired traits from parents with those desired traits

b)

natural method of producing offspring with desired traits

c)

creating a new species

d)

making organisms reproduce during times of stress

64.

Which of the following is an example of a beneficial mutation?

a)

When an organism's lifespan becomes shorter.

b)

When an organism becomes unable to reproduce.

c)

When an organism's body becomes deformed.

d)

When an organism develops immunity to a disease.

65.
Making changes in the DNA of an organism is
a)
selective breeding
b)
artificial selection
c)
genetic engineering
d)
genetic transformation

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