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Worksheets

Genetics

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

DNA has what shape?

a)

twisted ladder

b)

double helix

c)

both

d)

neither

2.

In human reproduction a baby-

a)

Receives 46 chromosomes from both parents

b)

Can inherit only 46 genes

c)

Receives 46 chromosomes from either parent

d)

Gets half of its chromosomes from the male and half from the female

3.

Meiosis is:

a)

The basic substance of heredity

b)

The reproduction of body cells

c)

The process of changing genes to produce a new trait

d)

A special kind of cell division producing sex cells

4.

The hereditary material that controls all cellular

activities is called-

a)

ATP

b)

Cytoplasm

c)

DNA

d)

Chloroplast

5.

The picture shows

a)

Chromosomes

b)

Punnett Square

c)

Phenotypes

d)

Genotypes

6.

In guinea pigs, brown fur (B) is dominant over white fur (b).

Design a Punnett square to demonstrate the possible outcome if a purebred brown guinea pig is crossed with a purebred white guinea pig.

What percentage of the offspring will have white fur?

a)

100%

b)

0%

c)

25%

d)

50%

7.

What are the main components of DNA? (choose all that apply)

a)

Oxides

b)

Nitrogen Bases

c)

Phosphates

d)

Sugar

e)

Carbon Bases

8.

Which of the following traits are inheritable? (Choose all that apply)

a)

Size of lips

b)

Dimples

c)

Hair color

d)

Shape of nose

e)

Calluses on hand

9.

Hybrid or heterozygous are -

a)

an allele whose trait always shows up in an organism when

it is present

b)

the set of information that controls a trait; code in DNA

c)

the passing of traits from parents to offspring

d)

the different forms of the gene

e)

an organism that has two different alleles for a trait

10.

an allele whose trait always shows up in an organism when

it is present

a)

Hybrid

b)

Dominant

c)

Recessive

d)

Gene

e)

Alleles

11.

The set of information that controls a trait; code in DNA

a)

Gene

b)

Traits

c)

Alleles

d)

Heredity

12.

The passing of traits from parents to offspring

a)

Alleles

b)

Gene

c)

Heredity

d)

Adaptation

13.

The different forms of the gene

a)

Dominant

b)

Alleles

c)

Adaptations

d)

Phenotype

14.

Developed the theory of Evolution

a)

Gregor Mendel

b)

Charles Darwin

c)

Watson & Crick

d)

Rosalind Franklin

15.

Created the first model of DNA; won a Nobel Prize

a)

Charles Darwin

b)

Gregor Mendel

c)

Watson & Crick

d)

Rosalind Franklin

16.

In the Punnett square, Black fur (B) is dominant over brown

fur (b). What is the phenotype of all four offspring?

a)

Brown

b)

Black

c)

White

d)

Mix of brown and black

17.

Of the traits listed in the table, which ones are not inherited?

a)

B, C, F, and G

b)

A, C, E, and H

c)

B, C, E, and H

d)

A, D, F, and G

18.

In Deoxyribonucleic Acid, Cytosine pairs with the nitrogen base -

a)

thymine

b)

adenine

c)

guanine

d)

none of the above

19.

Which scientists were the first to develop an accurate model of the DNA molecule?

a)

Robert Hooke and Anton van Leeuwenhoek

b)

Rosalind Frankln and Gregor Mendel

c)

James Watson and Francis Crick

d)

Gregor Mendel and Walter Sutton

20.

The hereditary material that controls all cellular activities is called -

a)

Cytoplasm

b)

DNA

c)

Chloroplasts

d)

ATP

21.

Genetic engineering can be used in a variety of ways. If the methods of genetic engineering are used to insert human genes into the cytoplasm of bacteria, the bacteria will then -

a)

destroy the foreign DNA

b)

produce human proteins

c)

become a new species of bacteria

d)

no longer be bacteria

22.

When scientists alter the genetic code of an organism, it is called -

a)

Mitochondrial DNA

b)

Genetic Engineering

c)

botany

d)

Cloning

23.

What traits could represent the phenotype of an organism?

a)

Tt, purple

b)

wrinkled, ww

c)

yellow, tall

d)

Rr, RR

24.

Which section of the shown figure carries the code for a particular trait in an organism?

a)

Section W

b)

Section X

c)

Section Y

d)

Section Z

25.

If free ear lobes (L) are dominant over attached ear lobes (l) what is the phenotype of an individual with a genotype of ll?

a)

Attached ear lobes

b)

Detached ear lobes

c)

LL

d)

One ear lobe attached, one ear lobe detached

26.

In rabbits, black fur (B) is dominant over white fur (b). If a heterozygous (hybrid) black rabbit mated with a homozygous (purebred) white rabbit, what percentage of the offspring will have black fur?

a)

75%

b)

0%

c)

100%

d)

50%

27.

In a genotype, what does the lower case letter represent?

a)

The dominant trait

b)

The recessive trait

c)

The multiple trait

d)

Genotypes are always capital letters

28.

Of the choices listed below, where is genetic engineering most often applied?

a)

Solar panels and electricity

b)

Dish detergents and shampoo

c)

Medicine and agriculture

d)

Dentistry and computers

29.

Widow's peak (W) is a dominant trait. Straight hairline (w) is a recessive trait. If parents that are both hybrids (Ww) for the trait have 4 children, how many of the 4 children will

express widow's peak?

a)

1

b)

2

c)

3

d)

4

30.

What forms the chemical code within a molecule of DNA?

a)

The arrangement of the sugars and bases

b)

The arrangement of the nitrogenous bases

c)

The arrangement of the phosphates and sugars

d)

The arrangement of the chromosomes

31.

What is the chromosome labeled in the picture?

a)

Section W

b)

Section X

c)

Section Y

d)

Section Z

32.

The chemist who was able to create images of DNA molecules using X-ray diffraction was-

a)

Gregor Mendel

b)

James Watson

c)

Rosalind Franklin

d)

Robert Hooke

33.

Research shows that genes can successfully be put into potato plants and produce vaccines against cholera and hepatitis B. What is the name for this type of research?

a)

Genetic Engineering

b)

Chromosome Mutation

c)

Artificial or Selective Breeding

d)

Cloning

34.

Which sex chromosome combination is for a female?

a)

XX

b)

XY

c)

XYY

d)

YY

35.

DNA is sometimes referred to as a ladder. Which two molecules make up the sides of the DNA ladder?

a)

phosphate and ribose

b)

phosphate and deoxyribose

c)

nitrogen base and ribose

d)

phosphate and nitrogen base

36.

What is NOT an example of DNA technology currently used in agriculture?

a)

The use of growth hormones produced from recombinant bacteria to increase milk production

b)

The cloning of human nerve cells from corn plants

c)

The development of frost resistant crop plants

d)

The development of pesticide resistant crop plants

37.

How many chromosomes are normally found in a human sex cell?

a)

46

b)

48

c)

23

d)

2000

38.

In Deoxyribonucleic acid, Adenine pairs with the nitrogen base -

a)

cytosine

b)

guanine

c)

adenine

d)

thymine

39.

What is an organism called that has two different genes for a trait? (examples: Tt or Rr)

a)

A hybrid/heterozygous

b)

A purebred/homozygous

c)

A mutation

d)

An endangered species

40.

Scientists have genetically engineered certain crops to be resistant to the harmful effects of pesticides. What is one advantage of this modification?

a)

The crops could potentially pass this modification onto the pest, which would allow the pest to eat the crops.

b)

The farmer will not kill his crops when defending them against a pest.

c)

The farmer will produce crops that could be potentially harmful to human consumption.

d)

The crops could have slower growing rates because of their modified genes.

41.

When Mendel worked with pea plants, he noticed that

some traits, like round seeds, seemed to hide other traits,

like wrinkled seeds. What do we call the trait that hides or

masks another trait?

a)

A recessive trait

b)

A dominant trait

c)

DNA Replication

d)

Incomplete Traits

42.

If the tall trait is dominant over the short trait, which

would be used to represent the dominant trait?

a)

T

b)

t

c)

S

d)

s

43.

What could represent the genotypes of an organism?

a)

Wrinkled, gY

b)

Tall, red

c)

Rr, TT

d)

Tt, green

44.

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

a)

1

b)

2

c)

3

d)

4

45.

According to the Punnett Square, what is the genotype of the parents?

a)

WW and WW

b)

ww and ww

c)

ww and Ww

d)

Ww and Ww

46.

A change or mistake in the DNA can cause-

a)

Meiosis

b)

Mutation

c)

Adaptation

d)

Blending

47.

In the Punnett Square, what are the genotypes of the parents?

a)

BB and BB

b)

bb and bb

c)

BB and bb

d)

Bb and bb

48.

How did Rosalind Franklin's work contribute to our understanding of DNA?

a)

Her photographs of the molecule showed that it was spiral.

b)

She made a dimensional model of the structure of DNA

c)

She analyzed the molecule and showed it had four nitrogen bases.

d)

She demonstrated how to transfer DNA from one organism to another

49.

When scientists take one gene and put it into another it is called -

a)

Mutation

b)

Genetic Engineering

c)

Cloning

d)

Selective Breeding

50.

If the entire insect population migrated out of the spider's habitat, which spider would most likely become extinct if it could not adapt to this change?

a)

1

b)

2

c)

3

d)

4