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QUIZ: MONOHYBRID CROSS

Total questions: 40

Worksheet time: 59mins

Name
Class
Date
1.

The physical expression of a genetic trait is called a

a)

mutation

b)

genotype

c)

crossing over

d)

phenotype

2.

The following items are examples of __________.

Items: eye color, hair color, height

a)

homozygous alleles

b)

genotype

c)

heterozygous alleles

d)

phenotype

3.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
4.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
5.
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
6.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
7.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
8.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
9.
Who is the father of genetics? 
a)
Charles Darwin 
b)
Gregor Mendel
c)
Dimitri Mendeleev 
d)
Hans Krebs 
10.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
11.

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%

12.

Which of the following is a heterozygous genotype? (Select ALL that apply)

a)

AA

b)

Aa

c)

aa

13.

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce blue hair? (Select ALL that apply)

a)

BB

b)

Bb

c)

bb

14.

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce green hair? (Select ALL that apply)

a)

AA

b)

Aa

c)

aa

15.

R- round

r-wrinkled


What is the genotype for wrinkled?

a)

RR

b)

rr

c)

Rr

16.

Heterozygous is when...

a)

the alleles are the same

b)

the alleles are different

c)

the alleles are absent

d)

the alleles are present

17.

B = brown fur b = white fur

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

a)

0% (0/4)

b)

25% (1/4)

c)

50% (2/4)

18.

The passing of genetic traits from parent to offspring is known as

a)

heredity

b)

trait

c)

gene

d)

allele

19.

An organism's genetic makeup

a)

phenotype

b)

genotype

c)

heterzygous

d)

allele

20.

An organism's appearance or other detectable characteristic

a)

genotype

b)

phenotype

c)

genetics

d)

heterozygous

21.
A characteristic that an organism can pass on to its offspring through its genes
a)
protein
b)
trait
c)
DNA
d)
gene
22.

A couple has three brown-eyed children. The parents are brown-eyed (Bb). The allele for brown eyes is dominant over the allele for blue eyes. They believe the fourth child they have will be blue-eyed. Which statement below explains what actually will happen?

a)

The couple will have a blue-eyed fourth child.

b)

The couple will have a brown-eyed fourth child.

c)

They have a 75% chance of having a blue-eyed child.

d)

They have a 25% chance of having a blue-eyed child.

23.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

24.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
25.
Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?
a)
100% Gg
b)
50% GG, 50% Gg
c)
25% GG, 50% Gg, 25% gg
d)
75% Gg, 25% gg
26.
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
27.
Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r). Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.
a)
0%
b)
25%
c)
50%
d)
100%
28.

In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired what are the possible genotypes of the parents? (There are two possible combinations.)

a)

Ss + Ss

b)

SS + SS

c)

SS + Ss

d)

ss + ss

29.
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%
30.
Why are your chromosomes arranged in pairs?
a)
Scientists have no idea
b)
Because you get one from your mom and one from your dad
c)
Because pairs can divide easier
d)
Because DNA is awesome
31.

A segment of DNA that has the ability to code for a specific trait.

a)

gene

b)

allele

c)

chromosome

d)

chromatid

32.
Chromosomes are made of
a)
DNA
b)
RNT
c)
WWE
d)
DMA
33.

True or False: DNA is the carrier for genetic information.

a)

True

b)

False

34.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
35.

The name given to new plants or babies that are produced by parents?

a)

Teenager

b)

Germination

c)

Offspring

d)

Family

36.

The passing on of traits and behaviors from parents to their offspring is

a)

offspring

b)

heredity

c)

DNA

d)

genes

37.

Differences between members of the same species are called _____________ .

a)
predators
b)
traits
c)
selections
d)
variations
38.

The scientific study of heredity is called __________ .

a)
Biology
b)
Gene Therapy
c)
Genetic Counseling
d)
Genetics
39.

Gregor Mendel is known as _________

a)

Modern Medicine

b)

Father of the Green Revolution

c)

Father of Genetics

d)

The Pea Plant Man

40.
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

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