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Genetics

Total questions: 33

Worksheet time: 29mins

Name
Class
Date
1.

Two identical alleles for a trait is known as

a)

homozygous

b)

heterozygous

c)

mutation

d)

codominance

2.

A physical appearance is

a)

genotype

b)

heterozygous

c)

phenotype

d)

codominance

3.

What does Pp mean?

a)

two dominant alleles

b)

heterozygous alleles

c)

one dominant allele

d)

two dominant and recessive alleles

4.

Who studied different characteristics of pea plants by cross-pollinating plants?

a)

Gregor Mendel

b)

Albert Punnett

c)

Sir Isaac Newton

d)

David Kuster

5.

Genotype is

a)

stem height

b)

feather color

c)

physical appearance

d)

genetic makeup

6.

Which term refers to physical characteristics that are studied in genetics

a)

traits

b)

offspring

c)

generations

d)

hybrids

7.

An organisms's allele combination is known as

a)

phenotype

b)

mutation

c)

hybrid

d)

genotype

8.

What does RR mean

a)

two dominant alleles

b)

heterozygous alleles

c)

at least one dominant allele

d)

one dominant and one recessive allele

9.
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
10.
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
11.
What did Gregor Mendel use to discover the principles that rule heredity?
a)
Pea Plant
b)
Pigeons
c)
Pear trees
d)
Photosynthesis
12.
What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?
a)
Genesis
b)
Elective traits
c)
Alleles
d)
Quadrants
13.
What do we call the result of the genotype (for example, the color of the peas)?
a)
Visible traits
b)
Physiotrait
c)
Genotype 2
d)
Phenotype
14.

Which of the following was Gregor Mendel's profession?

a)

monk

b)

grocery store clerk

c)

accountant

d)

writer

15.

Which of the following is true about the relationship between dominant and recessive alleles?

a)

The recessive shows if it is strong enough.

b)

The dominant and recessive show equally.

c)

The dominant and recessive will mix and show something in between.

d)

The dominant will show, hiding the recessive.

16.

Breeding two organisms in order to student the offspring's traits is called which of the following?

a)

mixing

b)

mendeling

c)

crossing

d)

inheriting

17.

Which of the following is an example of a phenotype?

a)

riding a bike

b)

Tt

c)

T

d)

blond hair

18.
How many letters does a genotype contain?
a)
1
b)
2
c)
3
d)
4
19.
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
20.

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)

rR

21.

Which of the following is the study of inherited traits?

a)

Botany

b)

Astronomy

c)

Genetics

d)

Ecology

22.
Recessive Traits show up 
a)
Always
b)
Only when there are two
23.

Which of the following is an example of a genotype?

a)

riding a bike

b)

Tt

c)

T

d)

blond hair

24.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
25.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
26.
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%
27.

The blending of two traits is known as ---

a)

incomplete dominance

b)

codominance

28.

A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---

a)

Codominance

b)

Incomplete dominance

29.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

30.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

a)

Incomplete dominance

b)

Codominance

31.

If you cross a black chicken with a white chicken, only black and white checkered chickens would be produced. What kind of inheritance pattern does this follow?

a)

Incomplete dominance

b)

Codominance

32.

This is an example of ---

a)

Incomplete dominance

b)

Codominance

33.

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

a)

Red and white

b)

Red

c)

Pink

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