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Unit 8 Genetics Review

Total questions: 72

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

A calico cat shows both the traits for orange fur and black fur. What kind of inheritance pattern is this?

a)

Incomplete Dominance

b)

Co Dominance

c)

Sex-Linked

d)

Polygenic

2.

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%

3.
A roan cow shows co-dominance in fur color (orange and 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
4.

This type of inheritance pattern is a Blend of both traits.

a)

incomplete dominance

b)

co-dominance

c)

complete dominance

d)

recessive pattern

5.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
6.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
7.
How many PAIRS of sex chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
8.

this image is an example of

a)

codominance

b)

dominance

c)

incomplete dominance

d)

polygenic dominance

9.

This is an example of ___________?

a)

Incomplete dominance

b)

Co-Dominance

c)

Sex-linked inheritance

d)

Autosomal recessive inheritance

10.

If you cross a black chicken with a white chicken, black-white checkered chickens are produced. What kind of inheritance pattern does this follow?

a)

incomplete Dominance

b)

Co-Dominance

c)

Sex-linked Inheritance

d)

Multiple alleles

11.
If you cross a red snapdragon with a white snapdragon, only pink snapdragons will be produced.  What type of inheritance pattern does this follow?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
12.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
13.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXB
b)
XbXb
c)
XbY
d)
XBY
14.
Hemophilia is a recessive x-linked disorder. According to the Punnett square, what percentage of offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
15.

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%

16.
AB blood type is an example of what type of inheritance?
a)
complete dominance
b)
incomplete dominance
c)
codominance
d)
polygenic inheritance
17.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
18.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
BB
19.

How are women represented on a Pedigree?

a)

Triangle

b)

Circle

c)

Square

d)

Octagon

20.

How are men represented on a Pedigree?

a)

Rectangle

b)

Circle

c)

Square

d)

Hexagon

21.

If a circle or square is completely shaded in, that means ________________.

a)

he or she is dominant.

b)

he or she is missing a trait.

c)

he or she is affected.

d)

he or she is a carrier.

22.

If one or neither of the parents have the disorder, but a child has the disorder, the disorder is _______________.

a)

Autosomal

b)

Dominant

c)

Recessive

d)

Heterozygous

23.

If mostly males are affected in the pedigree, the disorder is said to be ________________.

a)

Dominant

b)

Recessive

c)

Autosomal

d)

Sex-linked

24.

A _____________ is a diagram that shows the genotypes and phenotypes of organisms from one generation to the next

a)

Dihybrid cross

b)

Punnett square

c)

Pedigree

d)

Monohybrid cross

25.

Aa, DD, Bb, yy are all examples of ---

a)

genotypes.

b)

phenotypes.

26.

On a pedigree, this symbol represents a ---

a)

not affected female.

b)

not affected male.

c)

affected male.

d)

affected female.

27.

On a pedigree, this symbol represents a ----

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

28.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

29.

What is the mode of inheritance shown here?

a)

Recessive because it "skips" a generation

b)

Dominant because it shows up in every generation

30.

Passing on traits from parents to offspring

a)

Chromosome

b)

Genotype

c)

Heredity

d)

Allele

31.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
32.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
33.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
34.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
35.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
36.

A genotype (allele combination) consisting of a dominant (A) and a recessive (a) allele is known as

a)

Homozygous

b)

Homozygous recessive

c)

Homozygous Dominant

d)

Heterozygous

37.

A genotype (allele combination) consisting of two alleles that are the same, either both dominant or both recessive is known as

a)

Heterozygous

b)

Homozygous

c)

Hybrid

d)

Incomplete Dominance

38.

Which answer choice correctly identifies the following genotype:


HH

a)

Homozygous recessive

b)

Hybrid

c)

Heterozygous

d)

Homozygous Dominant

39.

Which answer choice correctly identifies the following genotype:


rr

a)

Heterozygous

b)

Homozygous Dominant

c)

Homozygous Recessive

d)

Hybrid

40.

Black (B) and brown (b) are examples of alleles for hair color. What are alleles?

a)

section of DNA that code for traits

b)

Variations of a trait, represented by capital or lower case letters

c)

parents in a cross

41.

A type of inheritance where there is no dominant allele. The heterozygous genotype (Aa) shows a blended phenotype.

a)

Codominance

b)

Complete dominance

c)

Incomplete Dominance

d)

Polygenic Traits

42.

A type of inheritance where there are two dominant alleles. The heterozygous genotype (BW) shows both alleles expressed fully/independently.

a)

Complete Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Polygenic Traits

43.

Which answer choice correctly identifies the male and female chromosome combination?

a)

Male: XX and Female: XX

b)

Male: XY and Female XY

c)

Male: XY and Female: XX

d)

Male: AB and Female: AB

44.

Homozygous recessive is represented by which answer choice?

a)

RR

b)

Rr

c)

RB

d)

rr

45.

Homozygous Dominant is represented by which genotype?

a)

RR

b)

Rr

c)

rr

d)

RB

46.

A dominant allele is

a)

an allele that is always expressed when present, represented by a capital letter (R)

b)

an allele that is hidden, represented by a lowercase letter (r)

c)

the same as a recessive allele

47.

The genetic make up of a trait, consisting of a two allele combination (RR, Rr, rr) is known as

a)

the phenotype

b)

the genotype

c)

the parents

d)

the offspring

48.

The physical characteristic that we see based on the genotypes is known as

a)

the genotype

b)

the phenotype

c)

the alleles

d)

the gene

49.
Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
Rr X Rr
a)
100%
b)
75%
c)
50%
d)
25%
50.
A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?
a)
RR X rr
b)
Rr X rr
c)
rr X rr
d)
RR X Rr
51.
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.
52.

In Sex-linked traits, males (XY) give their X traits to the

a)

Sons

b)

Daughters

c)

Both

53.

In sex-linked traits, males receive their X chromosome from

a)

Dad

b)

Mom and Dad

c)

Mom

d)

Mr. Esparza

54.

A Punnett Square is used to

a)

find the probability of the offspring genotype

b)

find the parent genotypes

c)

find the genes that are going to be crossed

d)

to find the alleles of the parents

55.

Purebred is the same as

a)

Heterozygous

b)

Homozygous

c)

Hybrid

56.

Hybrid is the same as

a)

Homozygous

b)

Heterozygous

c)

Purebred

d)

True-breeding

57.

In a dihybrid, a cross between two parents that are heterozygous for both traits always have which of the following ratios?

HhRr x HhRr

a)

9:3:3:1

b)

16:0:0:0

c)

12:0:0:4

d)

4:4:4:4

58.

In blood types, a male with a genotype AO will have what type of blood?

a)

Type B

b)

Type A

c)

Type AO

d)

Type O

59.

When two or more alleles for a trait exist in a population.  Ex: Different hair colors or fur colors

a)

Multiple Genes

b)

Multiple Alleles

c)

Co-Dominance

d)

Incomplete Inheritance

60.

Mendel's law of segregation states that during meiosis, the alleles that control each trait separate, and only _________________ from each pair is/are passed to the offspring

a)

1 allele

b)

the dominant trait

c)

2 alleles

d)

homozygous traits

61.

A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?

a)

25%

b)

50%

c)

75%

d)

100%

62.

A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?

a)

0%

b)

50%

c)

25%

d)

75%

63.

What is a Punnett square used to predict? 

a)

possible genotypes & phenotypes of offspring

b)

possible genotypes & phenotypes of the parents

c)

determine the actual outcome of genetic crosses

d)

determine how many offspring a couple will have 

64.

The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles.  This is an example of:

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic inheritance

65.

Color blindness is a sex-linked recessive disorder on the X chromosome. If the allele “b” is used to

denote color blindness, which of following genotype(s) correctly represent(s) a female that is color blind.

a)

BB

b)

bb

c)

XBXBX^BX^B  

d)

XbXb X^bX^{b\ }  

e)

XBXbX^BX^b  

66.

True or False: A baby can have a blood type of AB if one parent is type O. (Hint: create a Punnett Square)

a)

True

b)

False

67.

. There are no carriers for Huntington’s Disease- you either have it or you don’t. With this in mind, is Huntington’s disease caused by a dominant or recessive trait?

a)

sex-linked dominant

b)

autosomal dominant

c)

sex-linked recessive

d)

autosomal recessive

68.

Chart that shows how a trait is passed through families.

a)

Punnett square

b)

family tree

c)

offspring diagram

d)

pedigree

69.

Thor has a widow's peak (V-shaped hairline) because he has the allele combination WW. This makes Thor

a)

homozygous dominant.

b)

homozygous recessive.

c)

heterozygous.

70.

Ironically, Black Widow has no widow's peak because she is homozygous recessive for the gene. In other words, her genotype would be

a)

straight hairline.

b)

WW.

c)

Ww.

d)

ww.

71.
an example of polygenic inheritance is...
a)
height
b)
hitch hikers thumb
c)
blood types
72.
Which term(s) best describes the inheritance of human blood types? 
a)
incomplete dominance and multiple alleles
b)
codominance and epistasis
c)
codominance and multiple alleles
d)
incomplete dominance and codominance

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