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Genetics Quiz

Total questions: 40

Worksheet time: 1hrs 4mins

Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
3.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
4.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
5.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
6.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
7.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
8.

Law which states that different traits are inherited independently of each other

a)

Law of independent assortment

b)

Genetics law

9.

Law states that 1 allele is more dominant than the other. Recessive allele is only expressed when dominant is not present

a)

Law of dominance

b)

Law of inheritance

10.

If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

11.

What goes in box 15

a)

aabb

b)

AABB

c)

aaBB

d)

AAbb

12.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 
a)
0%
b)
25%
c)
50%
d)
100%
13.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)
Ry
b)
RRyy
c)
RrYy
d)
Rryy
14.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
15.

Based off this punnett square, what fraction of the offspring will have wrinkled, green seeds?

a)

9/16

b)

3/16

c)

1/16

d)

16/16

16.

Which of the following traits of a dog is inherited from its parents?

a)

the presence of fleas in its fur

b)

the color of its fur

c)

the ability to sit up and beg

d)

the habit of barking to go outside

17.
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
18.
Who is the father of genetics? 
a)
Charles Darwin 
b)
Gregor Mendel
c)
Dimitri Mendeleev 
d)
Hans Krebs 
19.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
20.

Objective #5

(B-brown eyes & b-blue eyes)

Cross (Dad)Bb X (Mom)BB.

List the possible genotypes from this cross.

a)

BB, Bb, bb

b)

BB

c)

BB, Bb

d)

bb,Bb

21.

_______ are the different forms of a gene.

a)

Duplicates

b)

Genes

c)

Pairs

d)

Alleles

22.

_____________ occurs when multiple genes determine the phenotype of a trait.

a)

Polygenic Inheritance

b)

Codominance

c)

Incomplete Dominance

d)

Required Dominance

23.

_____________ is when the offspring’s phenotype is a combination of the parents’ phenotypes.

a)

Pedigree

b)

Photo Dominance

c)

Codominance

d)

Incomplete Dominance

24.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
25.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

26.

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

27.

The green fish offspring in this image is an example of ---

a)

Incomplete dominance

b)

Codominance

28.
If a father is AA and a mother is AB, what is the probability for a child with AB blood? 
a)
0%
b)
25%
c)
50%
d)
75%
29.

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

a)

polygenic inheritance

b)

multiple alleles

c)

linked genes

d)

incomplete dominance

30.

The following pedigree chart shows _______ females and ______ males that DO NOT have the trait.

a)

7, 3

b)

4, 4

c)

3, 2

d)

3, 3

e)

57, 93.5

31.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
32.

How many daughters did the mother and father from the first generation have?

a)

2

b)

4

c)

5

d)

6

33.
If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?
a)
XbX
b)
XbXb
c)
XbYb
d)
XbY
34.

Cystic fibrosis is an autosomal recessive disease .


Study the pedigree what are the possible genotypes of #10? (more than one answer)

a)

AA

b)

Aa

c)

aa

d)

XAXa

35.

Generation 2 individuals 5 and 6 are

a)

brother and sister.

b)

cousins.

c)

married.

d)

not related.

36.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
37.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
38.
How is colorblindness inherited and what would be a colorblind male's genotype?
a)
x-linked recessive; Xhy
b)
autosomal recessive; hh
c)
autosomal dominant; HH or Hh
d)
x-linked dominant; XHy
39.
How is this trait inherited?
a)
autosomal dominant
b)
autosomal recessive
c)
x-linked dominant
d)
x-linked recessive
40.

Which of the following best describes the inheritance pattern of the shown pedigree?

a)

Autosomal Dominant

b)

Sex-Linked Dominant

c)

Autosomal Recessive

d)

Sex-Linked Recessive

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