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Worksheets

Heredity and Genetic Review

Total questions: 61

Worksheet time: 33mins

Name
Class
Date
1.

What is a trait that will only exhibit when the dominant allele is not present.

a)

DNA

b)

Dominant

c)

Recessive

2.

If you cross a white flower (pp) with a purple flower (PP), the possible genotypes of the offspring are

a)

PP and pp

b)

All Pp

c)

All PP

d)

All pp

3.

If you crossed a PP (purple) with a pp (white), what would the phenotypes be?

a)

all white

b)

all tall

c)

all purple

d)

1/2 white, 1/2 purple

4.

The organism's appearance is known as its

a)

heredity

b)

pedigree

c)

phenotype

d)

genotype

5.

If you cross two rabbits that have the genotype Bb, how many possible genotypes can be found in the offspring?

a)

one

b)

two

c)

three

d)

four

6.

_____________ describes a trait that covers over, or masks another form of that trait.

a)

recessive

b)

gene

c)

allele

d)

dominant

7.

_________________ describes a trait that is covered over, or masked by another form of that trait.

a)

dominant

b)

punnett

c)

recessive

d)

gene

8.

The letters representing the phenotype is called

a)

phenotype

b)

genotype

9.

Different forms of a gene are called

a)

alleles

b)

traits

10.

Two of the same alleles of the gene for a certain trait

a)

heterozygous

b)

homozygous

11.

Two different alleles of the gene for a certain trait

a)

homozygous

b)

heterozygous

12.

In a pedigree, what do circles represent?

a)

males

b)

females

c)

carrier

d)

non carrier

13.

In a pedigree, when a circle of square is halfway shaded, is it

a)

male

b)

female

c)

carrier

d)

non carrier

14.

Which genotype is hetrozygous?

a)

Bb

b)

BB

c)

DD

d)

dd

15.

Which genotype is homozygous dominant?

a)

Bb

b)

bb

c)

BB

d)

Dd

16.

Which is NOT an example of a phenotype?

a)

black fur

b)

blue eyes

c)

brown hair

d)

bb

17.

Which genotype is homozygous recessive?

a)

Bb

b)

BB

c)

bb

d)

brown eyes

18.

The brown eye trait is dominant over blue eyes. Which of the following genotypes best represents the phenotype for blue eyes?

a)

BB

b)

Bb

c)

bb

d)

bB

19.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
20.
A homozygous dominant plant (GG) and a homozygous recessive plant (gg) were cross. Green is dominant to yellow. What percentage of plants will be green?
a)
25%
b)
50%
c)
75%
d)
100%
21.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
22.

In the Punnett square, White petal color ( W ) is dominant over purple petal color ( w ). Of the four offspring, how many will have the white phenotype?

a)

1

b)

2

c)

3

d)

4

23.
If red is dominant to white, what is the correct percentage for offspring for the cross pictured in this Punnett square?
a)
50% red, 50% white
b)
0% red, 100% white
c)
100% red, 0% white
d)
25% red, 75% white
24.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
25.

Which of the following is true?

a)

1, 2, and 3 are carriers

b)

1 and 2 are the grandparent generation

c)

3 and 4 have heterozygous genotypes

d)

2 has the dominant phenotype

26.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
27.

If green (G) is dominant over purple (g), then what is the genotype for this organism?

a)

Purple

b)

Green

c)

Gg

d)

gg

28.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
29.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
30.

The above pedigree is most consistent with the observation that Huntington's Disease is —

a)

A is carried on the X chromosome

b)

B a dominant phenotype

c)

C can be diagnosed on a karyotype

d)

D is a polygenic trait

31.
What % of the offspring in this cross are heterozygous?
a)
25
b)
50
c)
75
d)
100
32.
The cross between Ff x ff, as shown in the picture above, will produce which the following offspring? 
a)
FF, Ff, ff, Ff
b)
Ff, Ff, ff, ff
c)
Ff, ff, FF, Ff
d)
Ff, ff, Ff, ff
33.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
34.

Traits controlled by two or more genes from different chromosomes

a)

medelian gene

b)

monogenic

trait

c)

polygenic

trait

d)

allele

trait

35.

In humans, cystic fibrosis is a recessive genetic disorder that results in mucus clogging the lungs. If both parents are genetically heterozygous for cystic fibrosis, then what are their chances of having a child who DOES NOT HAVE the disease?  (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)

a)

25%

b)

50%

c)

75%

d)

100%

36.

In humans, the trait for dimples is dominant over no dimples. If a heterozygous parent is crossed with a homozygous recessive parent, then what is the probability this couple will have offspring with dimples?  (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)

a)

25%

b)

50%

c)

75%

d)

100%

37.

In a classic Mendelian cross, a homozygous plant that produces purple fruit is crossed with a homozygous plant that produces blue fruit. The seeds of all the offspring are purple. Why?  (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)

a)

the alleles are expressing incomplete dominance

b)

the alleles are expressing codominance

c)

The blue allele is recessive to the dominant purple allele

38.

Albinism (b), is recessive to normal brown coloration (B). When an albino female was crossed with a brown male, they produced 2 offspring that had brown coloring and 2 that were albino. What was the genotype of the male parent?

a)

BB

b)

bb

c)

Bb

39.

Looking at the blood donation chart from our Blood Typing Lab, who is considered the "universal donor"?

a)

A

b)

B

c)

AB

d)

O

40.

If a person with O blood type produces offspring with a person heterozygous for A blood, then what percentage of their offspring will be type O?  (HINT: draw a punnett square to help solve the problem)

a)

0%

b)

25%

c)

50%

d)

100%

41.

Which blood type would not be possible for children of a Type AB mother & a Type B father?  (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)

a)

A

b)

B

c)

AB

d)

O

42.

Different forms of a gene are called

a)

alleles

b)

traits

43.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
44.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
45.

A man who is heterozygous for type B blood and a woman who is homozygous for type A. What are the chances that their first child will have type AB blood?

a)

25%

b)

50%

c)

75%

d)

100%

46.

In cows there is this color called roan. When you look at the hair closely you can see both red and white hairs. What complex inheritance pattern represents this trait?

a)

Incomplete Dominance

b)

Codominance

47.

Orville Oompa is heterozygous for type A blood. He wants to have kids that have type B blood. Is it possible for this to happen? If so, which genotype would his wife have to be?

a)

AA

b)

AO

c)

O

d)

BO

48.

A gardener decides she wants to have pink flowers for valentines day. Pink is a color that you get when you mix red and white. What cross will produce the most pink-flowered plants?

a)

RR x WW

b)

RW x RW

c)

RW x WW

d)

RR x RW

49.

In cattle roan is a color produced when a cow has BOTH RED AND WHITE hairs. Orville Oompa has 25 female cows on his farm, but decides he wants the next generation of cattle to be all red. He goes to his neighbor and purchases a red bull (male cow), and brings it to his farm. Orville Oompa crosses the red male with with only the roan females, and 20 new calves are produced. Of those 20 offspring, how many could orville expect to be red based on probabilities?

a)

5

b)

10

c)

15

d)

20

50.

A trait that is located on the X chromosome is called

a)

Multiple alleles

b)

Codominance

c)

Polygenic Inheritance

d)

X-linked traits

51.

A trait that is controlled by more than one gene is called

a)

Polygenic Inheritance

b)

Multiple alleles

c)

Incomplete dominance

d)

Codominance

52.

A trait in which a third phenotype appears that is always a blend of the parental phenotypes is called

a)

Polygenic Inheritance

b)

Multiple alleles

c)

Incomplete dominance

d)

Codominance

53.

A trait in which a third phenotype appears which includes both parental phenotypes (neither is lost) is called

a)

Polygenic Inheritance

b)

Multiple alleles

c)

Incomplete dominance

d)

Codominance

54.

A trait that has more than two alleles available per gene is called

a)

Polygenic Inheritance

b)

Multiple alleles

c)

Incomplete dominance

d)

Codominance

55.

Disorder: Colorblindness (X-linked)

Alleles: XB, Xb

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind


What is the genotype of a colorblind female?

a)

XBXB

b)

XBXb

c)

XbXb

d)

XbY

56.

Disorder: Colorblindness (X-linked)

Alleles: XB, Xb

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind


What is the genotype of a colorblind male?

a)

XBXB

b)

XBY

c)

XbXb

d)

XbY

57.

Disorder: Hemophilia (X-linked)

Alleles: XH, Xh

Dominant form of trait (H): Normal

Recessive form of trait (h): person has hemophilia


A phenotypically normal woman has phenotypically normal parents. However, she has a hemophilic brother. What are her chances of being a carrier for hemophilia?

a)

0%

b)

100%

c)

75%

d)

50%

58.

A woman with type B blood has two brothers with type O blood and one sister with type A blood. What are their parents’ genotypes? Use a Punnett square to show your work.

a)

IAi x IBi

b)

IAIA x IBIB

c)

IAIA x ii

d)

IBIB x ii

59.

Which type of inheritance patterns does blood type demonstrate?

a)

multiple alleles and incomplete dominance

b)

polygenetic inheritance and incomplete dominance

c)

polygenetic inheritance and codominance

d)

multiple alleles, polygenic, complete dominance and codominance

60.

One of Mendel's laws that states that two alleles for each trait during meiosis.

a)

Law of Independent Assortment

b)

Law of Segregation

c)

Genetic Recombination

d)

Homozygous

61.

One of Mendel's that states that the random distribution of alleles occurs during genetic formation.

a)

Recessive State of Genetics

b)

Genetic Recombination

c)

Law of Segregation

d)

Law of Independent Assortment