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Genetics Test

Total questions: 45

Worksheet time: 47mins

Name
Class
Date
1.
Are recessive traits shown with capital or lowercase letters? 
a)
Capital
b)
Lowercase
2.
The physical appearance or the way a gene looks is known as it's....
a)
genotype
b)
allele
c)
gene
d)
phenotype
3.
The mathematical chance that something will happen is known as...
a)
chance
b)
luck
c)
probability
4.
The different forms of genes are known as
a)
environment
b)
probability
c)
traits
d)
alleles
5.
An allele or gene that always shows is
a)
recessive
b)
dominant
c)
hidden
d)
present
6.
Two of the same genes for a trait (sometimes called purebred). BB or bb
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
7.
Two different genes for a trait (sometimes called hybrid). Bb
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
8.
What would the ratio for genotypes be for this Punnett Square?
a)
2Bb:2bb
b)
2BB:2Bb
c)
1BB:2Bb:1bb
d)
4Bb
9.
G = dominant green and y = recessive yellow
A fish has a Gy genotype, what will its phenotype be?
a)
yellow
b)
green
c)
greenish-yellow
d)
red
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.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
12.
What are the possible phenotypes in this punnett square?
a)
Bb, bb, BB
b)
purple, white
c)
Bb, bb
d)
light purple
13.
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
14.
What is a genotype? 
a)
The genetic make up (code)
b)
The physical trait
15.
Tall is dominant to short. What is the phenotype of this organism?
Tt
a)
tall
b)
short
16.

A mutation is harmful to an organism if it

a)

changes the phenotype of an organism

b)

changes the DNA segment

c)

reduces the organism's chance of survival

d)

makes the organism better able to avoid predators

17.

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

a)

Gregor Mendel

b)

Albert Punnett

c)

Sir Isaac Newton

d)

David Kuster

18.

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

a)

25%

b)

50%

c)

75%

d)

100%

19.

A purebred horse with white hair is crossed with a purebred horse with brown hair. Each of their offspring has both white and brown hair. Why does this occur?

a)

several alleles work together to determine a trait

b)

two alleles for hair are dominant

c)

two alleles for hair are recessive

d)

the alleles for fur color are neither dominant or recessive

20.

What does a Punnett Square determine?

a)

all of Mendel's discoveries about genetic crosses

b)

all the outcomes of a genetic cross

c)

only the recessive allele combinations

d)

only the dominant allele combinations

21.

A mutation is

a)

any change that is harmful

b)

any change in a gene or chromosome

c)

any change that is helpful

d)

any change in the phenotype

22.

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

a)

100%

b)

0%

c)

75%

d)

25%

23.

A mutation that is missing a nitrogen base is

a)

deletion

b)

substitution

c)

addition

d)

mixing

24.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
25.
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
26.
Snapdragon flowers come in red, pink and white.  What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
27.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
28.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
29.

earlobe attachment

a)

Inherited trait

b)

Acquired trait

30.

Knowing a language

a)

inherited

b)

acquired

31.
Birds' beak size
a)
inhertied
b)
acquired
32.
Dog fetching
a)
inherited
b)
acquired
33.
Bird building a nest
a)
inherited
b)
acquired
34.
When a bird uses mud and grass to build a nest, it's demonstrating...
a)
environmental influences
b)
learned behavior
c)
recessive traits
d)
instinct
35.
A behavior that is developed by observing others or by being taught is a 
a)
learned behavior 
b)
inherited trait
c)
adaptation 
d)
function
36.

Which of these is not an instinctive behavior?

a)

a bird building a nest

b)

a turtle burying its eggs

c)

a bear hibernating in winter

d)

a horse pulling a plow

37.
What do you call an inherited BEHAVIOR?
a)
inherited trait
b)
learned behavior
c)
instinct
d)
dominant gene
38.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
39.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
40.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
41.
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
42.
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
c)
Independent assortment
d)
Recessive inheritance
43.
Hemophilia is a sex-linked recessive trait found on the x chromosome.  Complete a cross between a woman who is a carrier and a man who is normal.
What are the chances, if they have a daughter, that she is a carrier?
a)
100%
b)
75%
c)
50%
d)
25%
44.
Hemophilia is a sex-linked recessive trait found on the x chromosome.  Complete a cross between a woman who has hemophilia and a normal man.
What are the chances of a child having hemophilia?
a)
100%
b)
75%
c)
50%
d)
25%
45.
If a male has an affected x chromosome for a sex-linked trait such as colorblindness, where did he get the chromosome from?
a)
His father
b)
His mother

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