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Basic Genetics

Total questions: 81

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

a)

Protein

b)

DNA

c)

RNA

d)

Glucose nucleic acid (GNA)

2.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
3.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
4.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
5.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
6.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

7.

Which of the following would be a phenotype?

a)

Aa

b)

red hair

c)

heterozygous

d)

DNA

8.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
9.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

10.

Which of the following genotypes is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

tT

11.

Which of these characteristics would not be passed on to its offspring?

a)

fur color

b)

length of tail

c)

scars on leg

d)

body size

12.

How many alleles are in the genotype for a simple trait?

a)

1

b)

2

c)

3

d)

4

13.

How many alleles (letters) does a child get from EACH parent for each trait?

a)

1

b)

2

c)

3

d)

4

14.

What would a homozygous allele combination look like? (Choose all that apply)

a)

AA

b)

Tt

c)

aa

d)

RR

15.

What would a heterozygous allele look like? (Choose all that apply?

a)

RR

b)

Rr

c)

Tt

d)

GG

16.

True or False: The dominant trait is represented by a lowercase letter (r).

a)

True

b)

False

17.

True or False: A trait is a characteristic passed from one generation to another.

a)

True

b)

False

18.

True or False: An allele is a variation of a certain gene. Example: Different Eye Colors

a)

True

b)

False

19.
aa always shows up as
a)
dominant
b)
recessive
20.

Which of these shows a homozygous dominant genotype?

a)

BB

b)

Bb

c)

bb

21.

Which of these shows a homozygous recessive genotype?

a)

BB

b)

Bb

c)

bb

22.

Which of these shows a heterozygous genotype?

a)

BB

b)

Bb

c)

bb

23.

A cleft chin is recessive and results from a cc genotype, but a non-cleft chin can be Cc or CC. It’s phenotype is

a)

Chromosome

b)

Dominant

c)

Recessive

d)

Genetics

24.

Blue eyes is a

a)

Genotype

b)

Phenotype

25.

Wrinkled seeds is a

a)

Genotype

b)

Phenotype

26.

AA is a

a)

Genotype

b)

Phenotype

27.

The study of heredity:

a)

Heredity

b)

Biology

c)

Genetics

d)

Chemistry

28.

The passing of physical characteristics from parents to offspring:

a)

Genetics

b)

Biology

c)

Heredity

d)

Ecology

29.

An allele whose trait always shows up in the organism when the allele is present.

a)

Dominant allele

b)

Recessive allele

30.

An allele that is masked/hidden when a dominant allele is present.

a)

Dominant allele

b)

Recessive allele

31.

The offspring of many generations that have the SAME traits.

a)

Purebred

b)

Hybrid

c)

Dominant allele

d)

Recessive allele

32.

An organism that has two different alleles for a trait.

a)

Purebred

b)

Hybrid

c)

Dominant allele

d)

Recessive allele

33.

The different FORMS of a gene:

a)

Alleles

b)

Gene

c)

Purebred

d)

Hybrid

34.

Physical characteristics of organisms:

a)

Trait

b)

Gene

c)

Allele

d)

Probability

35.

A unit that determines traits:

a)

Trait

b)

Gene

c)

Allele

d)

Probability

36.

An organism's physical appearance or visible traits:

a)

Genotype

b)

Phenotype

37.

An organism's genetic makeup, or allele combination.

a)

Phenotype

b)

Genotype

38.

Having two identical (same) alleles for a trait.

a)

Homozygous

b)

Heterozygous

39.

Having two different alleles for a trait.

a)

Homozygous

b)

Heterozygous

40.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
41.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
42.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
43.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
44.
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
45.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
46.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
47.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
48.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
49.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
50.
 Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
51.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
52.
Which represents the genotype of a homozygous condition?
a)
Bb
b)
BC
c)
bb
d)
bc
53.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
54.

Which of these genotypes would be heterozygous?

a)

Hh

b)

DD

c)

LL

d)

rr

55.

Select all homozygous dominant genotypes shown below.

a)

AA

b)

Aa

c)

aa

d)

TT

56.

A possible version of a trait that can be inherited is called a(n)

a)

allele

b)

genotype

c)

phenotype

d)

chromosome

57.

Purple flowers are dominant to white flowers. What phenotype will be seen with the genotype Pp?

a)

purple flowers

b)

purple and white flowers

c)

white flowers

58.

Floppy ears are dominant in terrier dogs. What type of ears will a dog with the alleles FF have?

a)

tall ears

b)

floppy ears

59.

Which of the following is homozygous recessive?

a)

FF

b)

Tt

c)

gg

d)

Rr

60.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)

BB

b)

bb

c)

Bb

61.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?
a)
Brown Hair
b)
Blonde Hair
c)
Brown and Blonde Hair
d)
Black Hair
62.

If you are studying genetics, then

a)

you are studying how traits are passed from parents to offspring

b)

you are studying pea plants

c)

you are studying how DNA is copied or replicated

d)

you are studying animals

63.

The physical expression of a trait or "how can organism looks for a trait", is the

a)

chromosome

b)

genotype

c)

phenotype

d)

allele

64.

Allele that covers up or masks another form of that trait

a)

dominant allele

b)

recessive allele

65.

An allele that is covered up by another form of that trait; two copies are needed for it to be expressed

a)

recessive allele

b)

dominant allele

66.

The actual alleles you inherit from your parents for a particular trait make up your _.

a)

genotype

b)

phenotype

c)

chromosome number

67.

Alleles symbolized by a lowercase letter (r).

a)

recessive

b)

dominant

68.

Alleles symbolized by an uppercase letter (R).

a)

recessive

b)

dominant

69.

Term that means "same genes."

a)

Homozygous

b)

Heterozygous

70.

Term that means "same genes."

a)

Homozygous

b)

Heterozygous

71.

Term that means "different genes."

a)

Homozygous

b)

Heterozygous

72.

Choose the heterozygous genotype.

a)

Hh

b)

hh

c)

HH

73.

Choose the homozygous recessive genotype.

a)

Hh

b)

hh

c)

HH

74.

Choose the homozygous dominant genotype.

a)

Hh

b)

hh

c)

HH

75.

Genotype codes for the physical expression of a trait. This is called ___________.

a)

phenotype

b)

holotype

c)

karyotype

d)

allotype

76.

A genotype with two of the same alleles for a trait

a)

Homozygous

b)

Heterozygous

c)

Allele

d)

Gene

77.

A genotype with two different alleles for a trait.

a)

Heterozygous

b)

Homozygous

c)

Dominant allele

d)

Recessive allele

78.
Name the following 
AA
a)
Homozygous Dominant 
b)
Homozygous Ressessive
c)
Heterzygous
d)
Heterozygous Dominant
79.

having two identical alleles for a particular gene (HH, hh)

a)

heterozygous

b)

homozygous

c)

multiple alleles

d)

trait

80.

BB

a)

Homozygous

b)

Heterozygous

81.

Bb

a)

Homozygous

b)

Heterozygous

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