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Mendelian Genetics Review

Total questions: 66

Worksheet time: 2hrs 17mins

Name
Class
Date
1.

If the dominant trait is having freckles (F) and the recessive trait is no freckles (f), which allele combination(s) below would represent a person who has freckles? (select all that apply)

a)

FF

b)

Ff

c)

ff

2.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 
a)
50 % Brown Hair and 50% Blond Hair 
b)
25 % Brown Hair and 75% Blond Hair 
c)
75 % Brown Hair and 25% Blond Hair 
d)
0% Brown Hair and 100% Blond Hair 
3.

The combination of genes a person has, represented by letters, is their...

a)

Genotype

b)

Phenotype

c)

Chromosome

d)

Punnett Square

4.

What belongs in the last box?

a)

RR

b)

Rr

c)

rr

d)

ff

5.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
6.

Look at the punnett square shown. What allele pair would replace the "?"

a)

WW

b)

Ww

c)

ww

7.

What belongs in Box 4?

a)

Y

b)

YY

c)

Yy

d)

yy

8.

Look at the punnett square. What is the probability that the offspring would have homozygous alleles for the trait?

a)

100%

b)

75%

c)

50%

d)

25%

e)

0%

9.
Both parents in this Punnet square
a)
are homozygous dominant
b)
are homozygous recessive
c)
are heterozygous
d)
have blue eyes
10.

What is the probability & phenotype of the offspring? (A-Brown hair; a-blond hair)

a)

50% Brown Hair and 50% Blond Hair

b)

25 % Brown Hair and 75% Blond Hair

c)

75 % Brown Hair and 25% Blond Hair

d)

0% Brown Hair and 100% Blond Hair

11.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

12.

Which of the following allele pairs is heterozygous?

a)

RR

b)

Qq

c)

ss

13.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
14.
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%
15.
A red flowered plant (RR) breeds 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%
16.
Question Image

Having a Widow's Peak is dominant (W) over not (w). If parent A (WW) and parent B (ww) have a child, what is the likelihood that--

a)

The child will have a widow's peak

1.

100%

b)

The child will not have a widow's peak

2.

0%

c)

The genotype of these children

3.

Ww

17.

Webbed fingers (F) are dominant over nonwebbed fingers (f). If parent A (Ff) and parent B (Ff) have children, which of the following are true? Select all that apply

a)

Phenotypes: 75% chance of having webbed fingers and 25% chance of not.

b)

Phenotypes: 100% chance of having webbed fingers and 0% chance of not.

c)

Phenotypes: 25% chance of having webbed fingers and 75% chance of not

d)

Genotypes: FF 25%, Ff 50%, ff 25%

e)

Genotypes: FF 75%, Ff 50%, ff 25%

18.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
19.

Brown eyes (B) tend to be dominant whereas blue eyes (b) tend to be recessive. Parents with heterozygous genes want to know: what is the likelihood of them having a child with blue eyes?

a)

0%

b)

25%

c)

75%

d)

100%

20.

Two heterozygous (Tt) tall pea plants are crossed. Tall (T) is dominant. Short (t) is recessive. Which is the likelihood of each phenotype?

a)

50% tall and 50% short

b)

75% tall and 25% short

c)

100% short

21.

Which of the following would complete this Punnett Square?

a)

aa

b)

AA

c)

Aa

22.

Brown eyes are dominant (B) to blue (b). If Parent A (bb) and Parent B (Bb) have a child, what is the likelihood that the child will have brown eyes?

a)

25%

b)

50%

c)

75%

d)

100%

23.

Select TWO answers. Which are the missing parts?

a)

BB

b)

bb

c)

Bb

24.

Which of the following must be the father's genotype?

a)

RR

b)

Rr

c)

rr

25.

If the father is homozygous recessive for dimples, what must the mother be for this Punnett Square?

a)

Dd (Heterozygous)

b)

DD (Homozygous Dominant)

c)

dd (Homozygous Recessive)

26.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
Mendelian dominance
d)
complete dominance
27.
Incomplete dominance or co-dominance?
A calico cat shows both the traits for orange fur and black fur. 
a)
Incomplete Dominance
b)
Co-dominance
c)
Complete dominance
d)
Mendelian dominance
28.
A roan cow shows co-dominance in fur color (orange & white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
29.

A breed of chicken shows incomplete dominance for feather color. One dominant allele codes for black feathers, another dominant allele codes for white feathers. The feathers of heterozygous chickens of this breed will be....

a)

all black

b)

all white

c)

all gray

d)

speckled black and white

30.

What are the possible genotypes for a person who has the blood group A?

a)

IAIA

b)

IAIi

c)

IAIB

d)

IBIi

31.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-dominance
c)
Mendelian dominance
d)
Complete dominance
32.
Normal red blood cells (rbc's) are bi-concave disks; sickle cells are abnormal. An individual can have both normal and sickle cells. What type of trait describes rbc shape?
a)
Incomplete dominance
b)
Co-dominance
c)
Mendelian dominance
d)
Complete dominance
33.

If Tom has the genotype IAIB and Angela has the genotype IBIi, what are the possible phenotypes of their children?

a)

Group A, Group B, Group AB only

b)

Group A, Group B, Group AB, and Group O

c)

Group A and Group AB only

d)

Group A and Group B only

34.

This type of dominance is ........................... because the heterozygote shows a phenotype that is .............................. .

a)

co-dominance, blended

b)

co-dominance, equal

c)

incomplete dominance, blended

d)

incomplete dominance, equal

35.

A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?

a)

Yes

b)

No

c)

Maybe

36.
Ged is blood type A and Linda is blood type B.  How can they have children who are types AB, and O?
a)
Alleles A and B are co-dominant, but allele O is recessive
b)
Alleles A and B are incompletely dominant, but allele O is recessive
c)
Alleles A and B are co-dominant, but allele O is completely dominant
d)
Alleles A and B are incompletely dominant, but allele O is completely dominant
37.

If one parent has type AB blood and the other parent has type O, what is the percentage chance that they will have a child with type AB blood?

a)

0%

b)

25%

c)

50%

d)

75%

38.

What does A indicate?

a)

A male that has the trait.

b)

A female that has the trait.

c)

A female that does not have the trait.

d)

A male that does not have the trait.

39.

What does A indicate?

a)

A male that has the trait.

b)

A female that has the trait.

c)

A female that does not have the trait.

d)

A male that does not have the trait.

40.

What does B indicate?

a)

line that indicates someone likes each other

b)

line that indicates a marriage

c)

line that indicates a relationship of parents and children

d)

A male that does not have the trait.

41.

How many generations are represented in the pedigree?

a)

2

b)

3

c)

4

d)

5

42.

In the diagram, individual III-3 indicates

a)

a female with no freckles

b)

a male with no freckles

c)

a male with freckles

d)

a female with freckles

43.

In the diagram, individual II-1 indicates

a)

a female with no freckles

b)

a male with no freckles

c)

a male with freckles

d)

a female with freckles

44.

What is the Genotype of individual I-1?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

45.

What is the Genotype of individual II-6?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

46.

What is the Genotype of individual III-2?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

47.

What do the circles represent?

a)

Male

b)

Female

48.

What do the squares represent?

a)

Male

b)

Female

49.

Examine the parents in generation I. How many children do they have?

a)

3

b)

5

c)

6

d)

7

50.

Examine the parents in generation I. How many grandchildren do they have?

a)

2

b)

4

c)

6

d)

11

51.

Examine the parents in generation I. How many great grandchildren do they have?

a)

0

b)

2

c)

3

d)

5

52.

The shaded shapes represent individuals with attached earlobes (ee). What is the genotype of the generation I parents?

a)

ee

b)

Ee

c)

EE

d)

It is not possible to determine

53.

Examine the parents in generation I. What is the genotype of their boys?

a)

EE or Ee

b)

EE or ee

c)

Ee or ee

d)

ee

54.

Segments of chromosomes that contain coded information for an organisms trait

a)

cells

b)

genes

c)

alleles

d)

genotypes

55.

The outward expression, or appearance, of a genetic trait is its

a)

allele

b)

pedigree

c)

phenotype

d)

inheritance

56.

A model that is used to show possible outcomes of cross breeding is a

a)

ratio

b)

coin toss

c)

pedigree

d)

Punnett square

57.
 Look at the Punnett square.
If the two parents represented in the Punnett square have four offspring, what does the Punnett square tells you? 
a)
Two of the offspring will definitely have the genotype Aa.
b)
It is more likely that two of them will have the genotype Aa than the genotype aa.
c)
There is a 50% chance for each of the four offspring to have the genotype Aa.
d)
It is less likely that two of them will have the genotype Aa than the genotype aa.
58.
An individual with two different alleles for a specific trait is said to be: 
a)
homozygous
b)
heterozygous
c)
homogeneous
d)
heterogeneous
59.
Phenotype refers to the _________ of an individual
a)
genetic makeup
b)
actual physical appearance
c)
recessive alleles
d)
dominant alleles
60.
When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele.
a)
dominant
b)
recessive
c)
both
d)
neither
61.
An organism that has two identical genes for a trait is said to be
a)
heterozygous for the trait
b)
hybrid for the trait
c)
homozygous for the trait
d)
incompletely dominant for the trait
62.
One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring having a white color.
a)
100%
b)
25%
c)
75%
d)
50%
63.
One cat carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.
a)
100%
b)
25%
c)
75%
d)
50%
64.
How many males are shown in this pedigree?
a)
8
b)
5
c)
2
d)
16
65.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
66.
Which choice best represents the genotype of this cross?
a)
1 Yy: 2 yy: 0 YY
b)
2 Yy: 2 yy: 0 YY
c)
3 Yy: 1 yy: 0 YY
d)
1 Yy: 3 yy: 0 YY

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