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heredity quiz

Total questions: 57

Worksheet time: 1hrs 6mins

Name
Class
Date
1.
______ is the passing of physical characteristics from parents to offspring.
a)
Trait
b)
Heredity
c)
Genetics
d)
Hybrid
2.
A new organism begins to form when egg and sperm cells join in the process called ______.
a)
Genetics
b)
Purebred
c)
Heredity
d)
Fertilization
3.
A ______ organism is the offspring of many generations that have the same form of a trait.
a)
Dominant Allele
b)
Hybrid
c)
Purebred
d)
Gene
4.
A ______ is one whose trait always shows up in the organism when the allele is present.
a)
Recessive Allele
b)
Dominant Allele
c)
Gene
d)
Heridity
5.
A ______ is hidden whenever a dominant allele is present.
a)
Trait
b)
Gene
c)
Recessive Allele
d)
Homozygous
6.
What kind of organism has two different alleles for a trait?
a)
Purebred
b)
Hybrid
c)
Homozygous
d)
Punnett Square
7.
What is a chart that shows all the possible ways alleles can combine in a genetic cross?
a)
Genetics
b)
Fertilization
c)
Probability
d)
Punnett Square
8.
What is a number that describes how likely it is that an event will occur?
a)
Probability
b)
Genetics
c)
Phenotype
d)
Alleles
9.
Which characteristic would most likely be inherited by a baby?
a)
brown hair
b)
crying a lot
c)
ability to jump high
d)
his ability to talk
10.
A dog rolls over and receives a treat. The dog rolls over again. This is an example of...
a)
learned behavior
b)
adaptive behavior
c)
inherited behavior
d)
instinctive behavior
11.
Which characteristic is inherited?
a)
hair color
b)
sleeping late
c)
enjoying hiking
d)
loving to read
12.
Which trait does a puppy inherit from its parents?
a)
fur color and pattern
b)
obedience to commands
c)
food brand preference
d)
affection for a specific home
13.
Which best explains why a child may look like his father, but is not able to play basketball as well as him?
a)
Physical characteristics are inherited, but the ability to shoot a basketball is not.
b)
The ability to shoot a basketball is inherited, but physical characteristics are not.
c)
The child chooses to look like his father, but he does not choose to play basketball.
d)
He hates playing basketball so he doesn't care if his dad can play.
14.
Which best describes an inherited trait?
a)
a characteristic one chooses to express
b)
a characteristic one receives from the food one eats
c)
a characteristic that is passed on from one's parents
d)
a characteristic that is influenced by one's surroundings
15.
A behavior that is developed by observing others or by being taught is a 
a)
learned behavior 
b)
inherited trait
c)
adaptation 
d)
function
16.
Characteristics that are passed from parents to their offspring are called 
a)
behaviors
b)
learned traits
c)
inherited traits
d)
functions
17.
Which of the following is an inherited trait?
a)
Tara's red hair
b)
Ryan's bank account
c)
Betty's dancing skills
d)
Marco's excellent Spanish
18.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
19.

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.

20.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
21.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
22.
Look at the picture. The probability that a child will inherit the recessive trait is
a)
25%
b)
50%
c)
75%
d)
100%
23.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
24.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
25.

An example of a homozygous dominant gene is

a)

Dd

b)

DD

c)

dd

d)

DAB

26.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics
27.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
28.
Hair colour is an example of
a)
genotype
b)
phenotype
29.
If a trait is recessive, it needs to be inherited from ___ parents to be 'expressed'.
a)
one
b)
both
30.

Punnett Square

a)

a genetic factor that blocks another genetic factor

b)

a genetic factor that is blocked by the presence of a dominant factor

c)

physical appearance of a trait

d)

a model used to predict possible genotypes and phenotypes of offspring

31.
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
d)
bB
32.

Physical appearance of a trait

a)

gene

b)

allele

c)

genotype

d)

phenotype

33.

Which of the following genotypes is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

tT

34.

A gene is __________

a)

the study of inheritance

b)

a physical trait

c)

a section of DNA that codes for a trait

35.

A gene is __________

a)

the study of inheritance

b)

a physical trait

c)

a section of DNA that codes for a trait

36.

A genotype is _____________

a)

a combination of alleles

b)

the physical appearance of an organism

c)

a genetic mutation

37.

A phenotype is ___________

a)

a combination of alleles

b)

the physical appearance of an organism

c)

a genetic mutation

38.

An allele is ___________

a)

a variation, or different form, of a gene

b)

a section of DNA that codes for a trait

c)

a genetic mutation

39.

The genotype yy is ________________

a)

homozygous dominant

b)

heterozygous

c)

homozygous recessive

40.

The genotype TT is __________

a)

homozyous dominant

b)

heterozygous

c)

homozygous recessive

41.

The genotype Qq is _________

a)

homozygous dominant

b)

heterozygous

c)

homozygous recessive

42.

Which of these genotypes is homozygous recessive?

a)

RR

b)

Rr

c)

rr

43.

Which of these genotypes is heterozygous?

a)

MM

b)

Mm

c)

mm

44.

Which of these genotypes is homozygous dominant?

a)

TT

b)

Tt

c)

tt

45.

Dominant (A) red apples

Recessive (a) yellow apples

What percentage of the offspring will be red?

a)

25%

b)

50%

c)

75%

d)

100%

46.

If all the offspring are purple, what is the genotype of the parent? (hint: it tells you the first letter)

a)

PP

b)

Pp

c)

pp

47.

If half the offpspring are white, and half the offspring are purple, then what is the genotype of the purple parent? (same hint here, it gives you the first letter)

a)

PP

b)

Pp

c)

pp

48.

Two humans are heterozygous for the eye color gene, and brown eyes are dominant. What are the odds of them having a child with blue eyes?

a)

25%

b)

50%

c)

75%

d)

100%

49.

Pea plants have two alleles for height: (T) for tall and (t) for short. What would the phenotype be for a pea plant that is heterozygous for the height gene?

a)

Tall

b)

Short

50.

If red flower color is the dominant allele (R), then what would the genotype of this rose plant be?

a)

homozygous dominant

b)

heterozygous

c)

homozygous recessive

51.

There are two cats that breed together. One parent is homozygous dominant and has a long tail. What percentage of the offspring have long tails?

a)

25%

b)

50%

c)

75%

d)

100%

52.

The genotype RR is _________

a)

homozygous dominant

b)

heterozygous

c)

homozygous recessive

53.

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

a)

recessive

b)

dominant

c)

both

54.

T - tall and t = short

In the Punnett square, what belongs in the missing square?

a)

tt

b)

Tt

c)

TT

55.

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

56.

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

a)

0%

b)

25%

c)

50%

d)

75%

57.

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%

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