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Unit 3 Learning Cycle 1 Review

Total questions: 51

Worksheet time: 2hrs 43mins

Name
Class
Date
1.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
2.

TRUE or FALSE: DNA is not in EVERY cell inside of our body.

a)

True

b)

False

3.

Choose the BEST answer. Traits in science can be defined as:

a)

How things look

b)

Characteristics and features that certain living things have

c)

Organizing things

d)

Information

4.

How do traits get passed down from one generation to the next?

a)

Traits are not passed down from one generation to the next

b)

Traits get passed down during sleep

c)

Traits get passed down through DNA

d)

Traits form after a baby is born.

5.
Which statement correctly describes a physical trait?
a)
Shawn is told by his mother that he has the same attitude as his father. 
b)
Kelly's eye color is the same as her mother's.
c)
Melody's mother claims that she get's angry easily.
d)
Lina is the most intelligent student at Dr. Javier Saenz Middle School. 
6.

What is the definition of chromosomes?

a)

Structures inside of our cell nucleus that hold our genes

b)

Parts of the cell membrane

c)

Structures that float around in the cytoplasm

7.

Genes can be defined as.......

a)

A type of pants

b)

Things that we find in the cytoplasm of our cells

c)

Sections of DNA that code for certain traits.

d)

Things in our cells that do not affect the body in any way

8.

Genetic traits are determined by one or more

a)

genes

b)

organelles

c)

random chances

d)

cells

9.

A version or variation of a gene

a)

trait

b)

gene

c)

allele

d)

DNA

10.

The alleles that an organism has/inherits are its

a)

genotype

b)

phenotype

c)

chromosome

d)

recessive

11.

The observable expression of a trait is its

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

12.

When an organism has two of the same alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

13.

When an organism has two different alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

14.

______ is the set of genes possessed by someone

a)

Karyotype

b)

Fingerprint

c)

Genotype

d)

Phenotype

15.

The physical expression of a trait.

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

16.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
17.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
18.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
19.

An example of a heterozygous gene is

a)

FF

b)

ff

c)

Ff

20.

An example of a homozygous recessive gene is

a)

Dd

b)

DD

c)

dd

d)

DAB

21.

An example of a homozygous dominant gene is

a)

Dd

b)

DD

c)

dd

d)

DAB

22.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
23.

Which of the following genotypes is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

tT

24.
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%
25.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
26.
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%
27.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
28.
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%
29.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
a)
25%
b)
0%
c)
100%
d)
50%
30.
Purple (P) is dominant to the white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
31.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
32.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
33.
What does a Punnett Square do?
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
34.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
35.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
36.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
37.

Sexual reproduction requires _ parents.

a)

one

b)

two

38.

Asexual reproduction requires _ parents.

a)

one

b)

two

39.

Which form of reproduction leads to MORE genetic diversity

a)

Sexual reproduction

b)

Asexual reproduction

40.

Choose the correct form of reproduction for the given statement:

Uses a sperm and egg cell

a)

Sexual Reproduction

b)

Both

c)

Asexual Reproduction

41.

Choose the correct form of reproduction for the given statement:

Produces genetically identical offspring (MOST of the time)

a)

Sexual Reproduction

b)

Both

c)

Asexual Reproduction

42.

Choose the correct form of reproduction for the given statement:

Produces genetically unique offspring

a)

Sexual Reproduction

b)

Both

c)

Asexual Reproduction

43.

The two major kinds of reproduction are ____________ and ____________.

a)

Asexual & sexual

b)

Division & multiplication

c)

Fragmentation & budding

d)

Linear & non-linear

44.

____________ reproduction involves one parent, & produces offspring that are genetically identical to the parent & to each other.

a)

Asexual

b)

Sexual

c)

Division

d)

Multiplication

45.

Reproduction that requires two parents and has offspring that are genetically different from the parents & from each other is called:

a)

Sexual reproduction

b)

Asexual reproduction

c)

Multiplication

d)

Division

46.

Any change in the sequence of DNA nucleotides is called a —

a)

transgenic shift

b)

monohybrid trait

c)

single genotype

d)

mutation

47.

Cell mutations within a DNA sequence are —

a)

unnatural events that are harmful to genetic diversity

b)

unnatural events that always affect the phenotype

c)

natural events that produce genetic diversity in organism

d)

natural events that always affect the phenotype

48.

Mutations are always bad

a)

true

b)

false

49.

An environment becomes colder. Some of the rabbits which live there have a mutation that causes their fur to be longer and thicker allowing them to stay warmer. This is an example of a

a)

positive mutation

b)

negative mutation

c)

neutral mutation

50.

A species of frog lives in the rainforest. One of the frogs is born with a mutation which causes it's skin to be completely white. This is an example of a

a)

positive mutation

b)

negative mutation

c)

neutral mutation

51.

Between 6,000 and 10,000 years ago a mutation led to blue eyes in humans. This is an example of a

a)

positive mutation

b)

negative mutation

c)

neutral mutation

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