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Genetics

Total questions: 38

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

The two letter code "RW" is an example of a.....

a)

Genotype

b)

Phenotype

2.

"Red fur" on a cow is an example of....

a)

A Genotype

b)

A Phenotype

3.
What is a gene?
a)
A bundle (like a hot dog bun) that the DNA is packed into
b)
something inside the nucleus
c)
a piece of DNA
d)
all of your DNA
4.

Which of the following sequences best describes the flow of information that takes place when a gene directs the synthesis of a cellular component?

a)

RNA-DNA-RNA-PROTEIN

b)

DNA-RNA-AMINO ACID-PROTEIN

c)

PROTEIN-RNA-DNA

d)

DNA-AMINO ACID-RNA-PROTEIN

5.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
6.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
7.

B = brown eyes, b = blue eyes [complete dominance]

In the punnett square, what is the probability for the offpring getting blue eyes?  

a)
0%
b)
25%
c)
50%
d)
75%
8.

In Rhododendron flowers, the R allele = Red and the W allele = White flowers. This is a flower with an RW genotype.

This is an example of.....

a)

Incomplete Dominance

b)

Complete Dominance

c)

Codominance

d)

Total Genetic Recall

9.

In Snapdragons, the R allele codes for Red Flowers, and the r allele codes for white flowers.

A snapdragon with a genotype of Rr is pink.

What is this an example of?

a)

Incomplete Dominance

b)

Codominance

c)

Complete Dominance

d)

Terminator Genes

10.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
11.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
12.

What is a pedigree chart used for?

a)

To see the probabilities of specific genotypes

b)

To see how a trait passes on from generation to generation

c)

to figure out how a bactera diseases reproduces

d)

it is not that useful

13.

Which of the following shows a genotype that would be considered homozygous? Choose all that apply.

a)

GG

b)

gg

c)

Gg

d)

Bb

e)

bb

14.

This scientist studied pea plants and was considered to be the "Father of Genetics".

a)

Reginald Punnett

b)

Gregor Mendel

c)

Charles Darwin

d)

Rosalind Franklin

15.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

16.

In cattle red coats are represented as RR, and white coats are represented as WW.


What is the genotype for Roan color?

a)

RR

b)

RW

c)

WW

17.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
18.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
19.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
20.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
21.
Emily has brown hair. Which is most likely a true statement about Emily?
a)
Emily’s favorite color is brown.
b)
Emily has a parent with brown hair.
c)
Emily’s older brother has brown hair. 
22.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
23.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
24.
What is a phenotype?
a)
The expression of a trait; physical appearance.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
25.

What chance is their for the offspring born with a homozygous dominant genotype?

a)

25%

b)

50%

c)

75%

d)

100%

26.

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

a)

0%

b)

25%

c)

50%

d)

100%

27.

What is the probability of heterozygous offspring?

a)

0%

b)

100%

c)

50%

d)

25%

28.

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 purple?

a)

25%

b)

0%

c)

100%

d)

50%

29.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
30.

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

31.
Is it possible for a visible trait to skip a generation? Example: Blue eyes
a)
Yes
b)
No
32.
An organism that has one dominant and one recessive allele for height is _____.
a)
unusual
b)
homozygous
c)
mutated
d)
heterozygous
33.
What is called when a organism has two identical alleles for a trait. TT or tt. RR or rr
a)
Heterozygous
b)
Homozygous
c)
Domozygous
d)
Thermozygous
34.
What is called when a organism has  two different alleles for a trait. Tt or Rr
a)
Heterozygous
b)
Homozygous
c)
Domozygous
d)
Thermozygous
35.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
36.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
37.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
38.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb

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