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Genetics Practice

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.

The physical appearance of an organism

a)

homozygous

b)

heterozygous

c)

genotype

d)

phenotype

2.

 An individual's genetic make-up (i.e., Aa v. aa).

a)

homozygous

b)

heterozygous

c)

genotype

d)

phenotype

3.

This allele that will mask another when present.

a)

dominant

b)

recessive

c)

genotype

d)

probability

4.

The likelihood of an event occurring

a)

segregation

b)

independent assortment

c)

probability

d)

codominance

5.

Separation of alleles during gamete formation.

a)

fertilization

b)

segregation

c)

probability

d)

genotype

6.

 Principle that states genes for different traits do not influence each other’s segregation

a)

heterozygous

b)

dominance

c)

independent assortment

d)

codominance

7.

A segment of DNA that codes for a specific trait.

a)

gene

b)

allele

c)

trait

d)

chromosome

8.

 Inheritance pattern in which both alleles are dominant so the heterozygous shows both phenotypes.

a)

dominant

b)

genotype

c)

codominant

d)

incomplete dominance

9.

 Inheritance pattern in which neither allele is dominant so the heterozygous shows as a 

  blend.

a)

dominant

b)

genotype

c)

codominant

d)

incomplete dominance

10.

 Different versions of a gene (i.e., A vs. a)

a)

codominant

b)

allele

c)

independent assortment

d)

heterozygous

11.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
12.
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%
13.
which blood type is the universal donor (all people can receive it)?
a)
O
b)
AB
c)
A
d)
B
14.

What inheritance patterns makes the blood type AB possible?

a)

incomplete dominance

b)

multiple alleles

c)

codominance

d)

total dominance

15.
The physical appearance of the allele combination the offspring receives
a)
genotype
b)
homozygous
c)
phenotype
d)
dominant
16.
A woman heterozygous for A blood marries a man heterozygous for B blood. What is the probability that they will produce offspring with AB blood?
a)
0%
b)
25%
c)
50%
d)
75%
17.
What is the chance of two parents with blood types AB and O producing an offspring with blood type O?
a)
0%
b)
25%
c)
50%
d)
100%
18.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
19.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
20.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
21.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
22.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
23.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
24.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
25.

What goes in box 15

a)

aabb

b)

AABB

c)

aaBB

d)

AAbb

26.
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%
27.
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
28.
In a dihybrid cross
a)
one trait is crossed.
b)
two traits are crossed.
c)
four boxes are needed for the punnett square.
d)
mom's alleles are dominant.
29.

What is the genotype for a pea plant homozygous for round seeds (R), and heterozygous for yellow seeds?

a)

RrYy

b)

RRyy

c)

RRYy

d)

rryy

30.

What are the blood types of the possible children that a woman (type O) and man (type AB) can have?

a)

O and AB

b)

O and A

c)

O and B

d)

A and B

31.

What is NOT a possible genotype for someone with type B blood?

a)

BB

b)

AB

c)

BO

32.
What is the genotype of a person with type A blood, who had a father with type O blood?
a)
AB
b)
AO
c)
AA
d)
OO
33.

The different forms of a gene are called

a)

traits

b)

pollinators

c)

alleles

d)

hybrids

34.

What type of inheritance is determined by multiple genes and there can be a range of traits?

a)

Codominance

b)

Incomplete dominance

c)

Polygenic traits

35.

AB blood type is an example of what type of inheritance? Both alleles show in the phenotype

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

36.

What did Gregor Mendel study?

a)

Mold Spores

b)

Pea Plants

c)

Sun Flowers

d)

Rats

37.

When an organism has two of the same alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

38.

When an organism has two different alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

39.

_____ are units of heredity made up of DNA.

a)

Centrioles

b)

Chromosomes

c)

Dnatoms

d)

Genes

40.

A trait that is hidden by the presence of a dominant trait is known as a _____ trait.

a)

coy

b)

demure

c)

modest

d)

recessive

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