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Genetics Review

Total questions: 36

Worksheet time: 43mins

Name
Class
Date
1.

Which of the following applies:

blue eyes, curly hair

a)

genotype

b)

phenotype

2.

Which of following applies:

Tt, BB, rr

a)

genotype

b)

phenotype

3.

controls the trait; you only need one gene for the trait to show up in an organism

a)

dominant

b)

recessive

4.

controls the trait; you only need one gene for the trait to show up in an organism

a)

dominant

b)

recessive

5.

the weaker trait; you need 2 genes for the trait to show up in an organism

a)

dominant

b)

recessive

6.

purebred; the same gene pair

a)

homozygous

b)

heterozygous

7.

hybrid; a different gene pair

a)

homozygous

b)

heterozygous

8.

TT, tt

a)

homozygous

b)

heterozygous

9.

Rr, Ff

a)

homozygous

b)

heterozygous

10.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
11.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
12.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
13.
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.
14.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
15.

What would be the genotype of individual 5 in generation II

a)

Female Bb

b)

Female bb

c)

Male BB

d)

Male Bb

16.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
17.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
18.
Which of the following is a phenotype?
a)
Aa
b)
black hair
c)
heterozygous genes
d)
mutated DNA
19.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
20.

A woman who is a carrier for colorblindness and a man who is NOT have a son. What is the probability that he is colorblind?

a)

25%

b)

50%

c)

75%

d)

100%

21.

A phenotype that results from a dominant allele must have at least_____ dominant allele(s) present in the parent(s)

a)

one

b)

two

c)

three

d)

four

22.

Genetic code is universal

a)

True

b)

False

23.
The following picture represents what pattern of inheritance?
a)
Complete dominance
b)
Incomplete dominance
c)
Co-dominance
d)
Sex-linked inheritance
24.

In complete dominant inheritance, is it possible for two dominant parents to have a recessive phenotype offspring?

a)

Yes if they are both heterozygous

b)

No

c)

Not sure

d)

Yes if they are both homozygous dominant

25.

Pattern of inheritance where two dominant alleles both are expressed at the same time

a)

Incomplete dominance

b)

Polygenic

c)

Sex-linked

d)

Codominance

26.

What pattern of inheritance is determined by many genes located on chromosomes that can give you a large range of traits?

a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
d)

Multiple Alleles

27.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
28.

Based on the picture of Mendel's experiment, which of Mendel's Laws could you propose?

a)
Law 1, The Law of Dominance
b)
Law 2, The Law of Segregation
c)
Law 3, The Law of Independent Assortment
d)
Both Law 1 and Law 2
29.

The law of independent assortment is when the alleles of two (or more) different genes get sorted into gametes independently of one another. Which of the following images would be example of this?

a)

b)

c)

30.

Cross an IAi blood type with an IBi blood type. What would be the resulting phenotype/genotype ratio?

a)

25% AB; 25% BO; 25%AO; 25%OO

b)

100% AB

c)

50% AO; 50%BO

d)

25% AO; 50%BO; 25%OO

31.
Which of the following genotypes belongs in the red box in the Punnett square?
a)

XBXb

b)

XbXb

c)

XbY

d)

XBY

32.

What is the chance that a daughter will be colorblind?

a)

100%

b)

50%

c)

25%

d)

0%

33.

What is the likelihood of this cross have a child that is colorblind?

a)

100%

b)

75%

c)

50%

d)

25%

34.

If a person has type O blood, the phenotype is O. What can the genotype be?

a)

IBIB or IBi

b)

IAIA or IAi

c)

IAIB

d)

ii

35.

This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the father (square) in generation 1?

a)

Aa

b)

AA

c)

aa

36.

During the formation of gamete, each gene separates from each other so that each gamete carries only one allele for each gene what would the possible Gametes would be for a BbHh genotype

a)

BH, HB, BH, bh

b)

bh, bh, BH, HB

c)

BH, Hb, Bh, bh