Free Printable Unit 6 Review

1.

While observing a litter of guinea pigs, Jack and Jill noticed that they had a variety of brown and white coats. They knew the guinea pigs had the same parents and that they were all from the same litter. Which best explains why they had different coat colors?

a)

they received an exact copy of both parents' DNA

b)

they randomly received DNA from only one parent

c)

the coat color is random and not influenced by parents

d)

they received different combinations of DNA from both parents

2.

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

a)

50% heterozygous 50% homozygous dominant

b)

50% heterozygous 50% homozygous recessive

c)

50% heterozygous 25% homozygous recessive 25% homozygous dominant

d)

100% heterozygous

3.

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

a)

50% heterozygous 50% homozygous dominant

b)

50% heterozygous 50% homozygous recessive

c)

50% heterozygous 25% homozygous recessive 25% homozygous dominant

d)

100% heterozygous

4.

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

a)

50% heterozygous 50% homozygous dominant

b)

50% heterozygous 50% homozygous recessive

c)

50% heterozygous 25% homozygous recessive 25% homozygous dominant

d)

100% heterozygous

5.

Julie learned that Auburn hair is dominant over red hair. She began to wonder if two parents with Auburn hair could produce offspring with red hair. Which of the following punnett squares shows Auburn haired parents that can produce offspring with red hair?

a)

b)

c)

d)

6.

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait. Based on the information in the pedigree what is the genotype for individual I-1?

a)

hetyerozygous

b)

homozygous recessive

c)

homozygous dominant

d)

none of the above

7.

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait. Based on the information in the pedigree what is the genotype for individual I-2?

a)

hetyerozygous

b)

homozygous recessive

c)

homozygous dominant

d)

none of the above

8.

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait. Based on the information in the pedigree what is the genotype for individual II-3?

a)

hetyerozygous

b)

homozygous recessive

c)

homozygous dominant

d)

none of the above

9.

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait. Based on the information in the pedigree what is the genotype for individual II-2?

a)

hetyerozygous

b)

homozygous recessive

c)

homozygous dominant

d)

none of the above

10.

Which image represents the type of cellular reproduction responsible for the production of reproductive cells?

a)

b)

c)

d)

11.

Which image represents the type of cellular reproduction responsible for the production of body cells?

a)

b)

c)

d)

12.

Some fungi are able to reproduce both sexually and asexually. If the environment where the fungi are growing changes, which type of reproduction would the fungi benefit from?

a)

sexual because it makes many offspring quickly

b)

asexual because it makes many offspring so quick the changing environment does not matter

c)

sexual because the genetically diverse offspring are more likely to survive

d)

asexual because the genetically identical offspring are more likely to survive

13.

Which best describes the process of asexual reproduction?

a)

happens through meiosis and results in 4 different cells

b)

happens through mitosis and results in two identical cells

c)

happens through mitosis and results in unique offspring

d)

happens through meiosis and makes identical offspring

14.

If 'T' codes for the tall trait and 'T' codes for the short trait. What is the probability that the offspring between a heterozygous dad and a homozygous short mom will be tall?

a)

25

b)

50

c)

75

d)

100

15.

If 'T' codes for the tall trait and 't' codes for the short trait. What is the probability that the offspring between a heterozygous dad and a heterozygous mom will be tall?

a)

25

b)

50

c)

75

d)

100

16.

Two identical alleles for a trait is known as

a)

homozygous

b)

heterozygous

c)

mutation

d)

codominance

17.

An organism's physical appearance is its

a)

genotype

b)

heterozygous

c)

phenotype

d)

codominance

18.

A mutation is harmful to an organism if it

a)

changes the phenotype of an organism

b)

changes the DNA segment

c)

reduces the organism's chance of survival

d)

makes the organism better able to avoid predators

19.

What does Pp mean?

a)

two dominant alleles

b)

heterozygous alleles

c)

one dominant allele

d)

two dominant and recessive alleles

20.

Who studied different characteristics of pea plants by cross-pollinating them?

a)

Gregor Mendel

b)

Albert Punnett

c)

Sir Isaac Newton

d)

David Kuster

21.

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

a)

25%

b)

50%

c)

75%

d)

100%

22.

A purebred horse with white hair is crossed with a purebred horse with brown hair. Each of their offspring has both white and brown hair. Why does this occur?

a)

because several alleles work together to determine some traits

b)

because two alleles for hair color are dominant

c)

because two alleles for hair color are recessive

d)

because the alleles for hair color are neither dominant nor recessive

23.

What does a Punnett Square determine?

a)

all of Mendel's discoveries about genetic crosses

b)

all the possible outcomes of a genetic cross

c)

only the recessive allele combinations in a genetic cross

d)

only the dominant allele combinations in a genetic cross

24.

A genotype is an organism's what?

a)

stem height

b)

feather color

c)

physical appearance

d)

genetic makeup

25.

The term that relates to physical characteristics that are studied in genetics is

a)

traits

b)

offspring

c)

generations

d)

hybrids

26.

Factors that control traits are called

a)

purebreds

b)

genes

c)

recessives

d)

parents

27.

Scientists call an organism with two different alleles for a trait a

a)

factor

b)

purebred

c)

trait

d)

hybrid

28.

A mutation is

a)

any change that is harmful

b)

any change in a gene or chromosome

c)

any change that is helpful

d)

any change in the phenotype

29.

Which term refers to physical characteristics that are studied in genetics

a)

traits

b)

offspring

c)

generations

d)

hybrids

30.

An organisms's allele combination is known as its

a)

phenotype

b)

mutation

c)

hybrid

d)

genotype

31.

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

a)

100%

b)

0%

c)

75%

d)

25%

32.

What does RR mean

a)

homozygous dominant alleles

b)

heterozygous alleles

c)

homozygous recessive alleles

d)

one dominant and one recessive allele

33.

A mutation that is missing a nitrogen base is a

a)

deletion

b)

substitution

c)

addition

d)

mixing

34.

What is the primary generation for a Punnett Square called?

a)

F2 generation

b)

F1 generation

c)

Parent generation

d)

Genotype generation

35.

A mother gives birth to a son, she then gives birth to a daughter. What is the likely hood that she will have another son?

a)

75%

b)

25%

c)

50%

d)

100%

36.

An offspring will receive how many alleles from each parent to determine a specific trait?

a)

one

b)

two

c)

three

d)

five

37.

having two of the same genes for the trait (sometimes called purebred).

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

38.

Incomplete dominance means that the traits are

a)

expressed equally

b)

dominant

c)

recessive

d)

blended

39.

One form of a gene is called_______________

a)

a DNA

b)

a Phenotype

c)

a trait

d)

an allele

40.

If green is dominant over purple, then what is the genotype for this individual?

a)

Purple

b)

Green

c)

GG

d)

gg

41.

Which is the correct phenotype for this organism?

a)

BB

b)

blue

c)

green

d)

bb

42.

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

a)

Tall = T
Short = S

b)

Tall = T
Short = t

c)

Tall = t
Short = T

d)

Tall = TT
Short = tt

43.

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

a)

0%

b)

25%

c)

50%

d)

75%

44.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

45.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

46.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

47.

What are the possible genotypes for this cross?
(Click the picture to see it without the text)

a)

TT = 25% Tt= 50% tt=25%

b)

all tall

c)

TT= 75% tt = 25%

d)

Tt = 100%

48.

If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.

a)

incomplete dominance

b)

codominance

c)

codependant

d)

cooperative

49.

B=Brown fur

b=tan fur

What percent of the offspring would be tan when you cross BbxBb?

a)

75%

b)

25%

c)

50%

d)

100%

50.

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

a)

It is BB

b)

It is Bb

c)

It is brown

d)

It is bb

51.

This punnett square shows a cross between

a)

A hybrid Parent and a Homozygous parent

b)

A heterozygous parent and a heterozygous parent

c)

Two homozygous parents

d)

Two Hybrid Parents

52.

One dog carries homozygous, short-haired traits (SS), and its mate carries homozygous long-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having short hair.

a)

100%

b)

75%

c)

50%

d)

25%

53.

Why are there no white rabbit babies?

a)

The white gene is not present in any of the babies.

b)

It takes two recessive genes to show the trait.

c)

Grey is a better color.

d)

Baby five will be white.

54.

The study of how traits are inherited through the interactions of genes.

a)

Genetics

b)

Heredity

c)

Trait

d)

Allele

55.

The material that controls which traits are expressed in an organism.

a)

Gene

b)

Allele

c)

Trait

d)

Genotype

56.

The passing of traits from parent to offspring.

a)

Heredity

b)

Allele

c)

Trait

d)

Phenotype

57.

Ways of looking, thinking, or being that are passed down through the genes from parents to offspring.

a)

Trait

b)

Gene

c)

Recessive Trait

d)

Dominant Trait

58.

A trait that is covered over by another form of that trait.

a)

Recessive Trait

b)

Dominant Trait

c)

Allele

d)

Gene

59.

A trait that covers over another form of that trait.

a)

Dominant Trait

b)

Recessive Trait

c)

Allele

d)

Gene

60.

An organism that has both aleles in the same form: dominant or recessive

a)

Homozygous

b)

Heterozygous

c)

Heredity

d)

Allele

61.

An organism that has one dominant allele and one recessive allele.

a)

Heterozygous

b)

Homozygous

c)

Gene

d)

Trait

62.

An organism's genetic make up. Usually expressed in letters.

a)

Genotype

b)

Phenotype

c)

Dominate Trait

d)

Recessive Trait

63.

Outward physical appearance and behavior of an organism.

a)

Genotype

b)

Phenotype

c)

Punnett Square

d)

Genetics

64.

A tool to predict the probability of certain traits that could be found in the offspring.

a)

Punnett Square

b)

Recessive Trait

c)

Allele

d)

Heterozygous Allele

65.

Select all of the following genotypes that are considered Homozygous.

a)

AA

b)

Bb

c)

zz

d)

Dd

e)

Hh

66.

Select all of the following genotypes that are considered Heterozygous.

a)

AA

b)

bb

c)

Hh

d)

Dd

e)

zz

67.

Red flowers (R) are dominant over white flowers (r). Select the genotypes that would produce red flowers.

a)

RR

b)

Rr

c)

rr

d)

Rw

68.

Green peas plants (G) are dominant over yellow pea plants (g). What genotype(s) would produce a yellow pea plant?

a)

GG

b)

Gg

c)

gg

d)

Gy

69.

Brown Eyes (B) are dominate to green eyes (b).

What phenotype would be produced by the following genotype.

bb

a)

brown eyes

b)

green eyes

c)

blue eyes

d)

purple eyes

70.

B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.

a)

they have same phenotype and genotype

b)

they have different genotypes and phenotypes

c)

they have same phenotype but different genotypes

d)

they have same genotype but different phenotypes

71.

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)

one allele

b)

the dominant trait

c)

two alleles

d)

the recessive trait

72.

Gregor Mendel conducted many experiments on pea plants and set the foundation for genetics. Select all of the following concepts that Mendel discovered during his studies.

a)

Mendel determined that some traits were dominant and would cover up other recessive traits.

b)

Mendel determined that genotypes could be heterozygous or homozygous.

c)

Mendel determined that one allele was given from each parent plant to its offspring.

d)

Mendel used Punnett Squares to determine the specific genotype, phenotype, and number of plants for each offspring.

73.

What is an autosome?

a)

automobile built for one person

b)

chromosome that does not determine gender

c)

chromosome that does determine gender

d)

a plant because they do photosynthesis

74.

Which of these statements is true?

a)

Humans have the highest number of chromosomes among mammals.

b)

All mammals have the same number of chromosomes.

c)

Different species have a different number of chromosomes.

d)

More than one choice is true.

75.

Looking at the karyotype, is this person male or female, and how do you know?

a)

There is no way to tell from a karyotype.

b)

Male - has two X's

c)

female - has two X's

d)

Male - has an X and Y

76.

Looking at this karyotype, what atypical chromosome grouping do you observe?

a)

This is a male without a y chromosome.

b)

This is a female without a second X chromosome.

c)

Nothing atypical

77.

Looking at this karyotype, what atypical chromosome grouping do you observe?

a)

lack of a y chromosome

b)

trisomy 13 (3 copies of 13)

c)

just a typical girl

d)

just a typical boy

78.

How is cystic fibrosis inherited, and what would be a genotype for a male with CF?

a)

X-linked recessive; X^fy

b)

X-linked dominant; X^Fy

c)

autosomal recessive; ff

d)

autosomal dominant; FF or Ff

79.

How is this trait inherited?

a)

autosomal dominant

b)

autosomal recessive

c)

x-linked dominant

d)

x-linked recessive

80.

If this is an autosomal recessive inheritance, which of the following would be true statements about carriers of this trait?

a)

In generation 1, person 1 is a carrier, but 2 would not have to be a carrier.

b)

In generation III, both 1 and 2 have to be carriers.

c)

In generation II, 1, 3, and 4 have to be carriers.

d)

In generation IV, 2,3 and 4 must be carriers.

81.

The double line connecting 4 and 5 in the last generation means ___________.

a)

they were married twice

b)

they are married cousins

c)

they are twins

d)

they are divorced

82.

What is the passing of traits from parents to offspring?

a)

Heredity

b)

Genetics

c)

Traits

d)

Mendelian

83.

Blonde hair is a....

a)

Trait

b)

Genotype

c)

Gene

84.

What is the study of heredity?

a)

Genetics

b)

Mendel

c)

Pea plants

d)

Genes

85.

What is the passing of traits from parents to offspring?

a)

Heredity

b)

Genetics

c)

Traits

d)

Mendelian

86.

Blonde hair is a....

a)

Trait

b)

Genotype

c)

Gene

87.

What is the study of heredity?

a)

Genetics

b)

Mendel

c)

Pea plants

d)

Genes

88.

Genes are inherited in pairs, one from each parent.

a)

True

b)

False

89.

Alleles are different forms of a gene.

a)

True

b)

False

90.

A dominant trait: CHOOSE 2

a)

will block a recessive trait

b)

is shown with a capital letter

c)

always occurs more often

d)

is better

91.

Which of these is heterozygous?

a)

Hh

b)

HH

c)

hh

d)

None of these

92.

HH is

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous

d)

neither dominant nor recessive

93.

hh is

a)

homozygous recessive

b)

homozygous dominant

c)

heterozygous

d)

neither dominant nor recessive

94.

If long hair (L) is dominant to short hair (l), what is the phenotype of Ll?

a)

Long hair

b)

Dominant

c)

Medium hair

d)

Recessive

95.

How a trait is expressed is the what?

a)

phenotype

b)

genotype

c)

gene

d)

dominant

96.

The two alleles that join to determine a phenotype create the what?

a)

a genotype

b)

dominant

c)

recessive

d)

heterozygous

97.

Hybrid is another way of saying

a)

heterozygous

b)

purebred

c)

dominant

d)

recessive

98.

Homozygous is another way of saying

a)

Purebred

b)

Hybrid

c)

Dominant

d)

Recessive

99.

If you know that hairy (H) is dominant to non-hairy (h) as shown in this picture, can you tell whether this guinea pig is Hh or HH?

a)

No, Hh and HH have the same phenotype

b)

No, this guinea pig would be hh

c)

Yes, Hh and HH will look different

100.

What is the probability of Aa?

a)

50%

b)

100%

c)

25%

d)

0%

101.

If brown (B) is dominant to blue (b), what are the possible phenotype(s) of this cross?

a)

Brown and blue

b)

Bb and bb

c)

Brown

d)

Bb

102.

These parents are each

a)

Homozygous

b)

Heterozygous

c)

The same

d)

Heterozygous

Unit 6 Review

Total questions: 102

Worksheet time: 51mins

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