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Worksheets

Genetics

Total questions: 52

Worksheet time: 38mins

Name
Class
Date
1.
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
2.
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%
3.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
4.

If a heterozygous(hybrid) tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring? T= tall and t = short

a)

100% Tt

b)

50% Tt, 50% tt

c)

75%Tt, 25%tt

d)

25%TT, 50%Tt, 25%tt

5.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
6.

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed? B = brown eye color and b = blue eye color

a)

0 %

b)

25%

c)

50%

d)

75%

7.

A corn plant heterozygous (hybrid) for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?

a)

1

b)

2

c)

3

d)

4

8.

A heterozygous (hybrid) yellow pea plant's genotype would be..... Y = yellow seeds and y = green seeds

a)

YY

b)

yy

c)

Yy

d)

Yg

9.

Which process and type of resulting cells are represented?

a)

mitosis, sex cells

b)

mitosis, body cells

c)

meiosis, sex cells

d)

meiosis, body cells

10.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
11.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
12.

What is a phenotype?

a)

An organism's physical appearance like brown hair

b)

An organism's genetic make-up like Bb.

c)

The ability of an organism's genes to mutate.

d)

the passing of traits from parent to offspring

13.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
14.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
15.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
16.
The passing of traits from parent to offspring 
a)
Heredity 
b)
Genetics 
c)
Hybrid 
d)
Probability 
17.
Which is homozygous ?
a)
Zz
b)
SS
18.
the genetic makeup of an organism
a)
heterozygous
b)
punnet square
c)
genotype
19.

A chart used to predict the probability of getting a specific genetic outcome is called a....

a)

a genetic engineering graph

b)

punnet square

c)

probability chart

d)

family tree

20.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
21.

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

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

22.

Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit (get in her DNA)?

a)

height

b)

the scar

c)

ability to swim

d)

ability to play drums

23.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
24.
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
25.

What is the phenotype of the heterozygous (hybrid) parent in the punnett square?

a)

green

b)

yellow

c)

hybrid

d)

purebred

26.
In this punnett square, which is the dominant trait?
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
27.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
28.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
29.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
30.

Different forms of a gene are called........

a)

alleles

b)

chromosomes

c)

genotype

d)

nitrogen bases

31.

A chunk of DNA that holds the recipe for making a protein is called....

a)

a gene

b)

a chromosome

c)

a heredity unit

d)

a nitrogen base

32.

HH is crossed with Hh. What is the probability of getting hh in the offspring?

a)

0%

b)

25%

c)

50%

d)

100%

33.

hh is crossed with HH, what is the probability of getting Hh in the offspring?

a)

0%

b)

25%

c)

50%

d)

100%

34.

Parents would NOT pass on (in terms of DNA) which of the following traits to their offspring?

a)

freckles

b)

eye color

c)

hair style

d)

dimples

35.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
36.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
37.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
38.
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
39.
A change in DNA or chromosomes
a)
Mitosis
b)
Meiosis
c)
mutation
d)
Osmosis
40.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
41.
Which combination of sex chromosomes results in a male human being?
a)
XX
b)
YY
c)
XY
d)
either XX or YY
42.

Which process and type of resulting cells are represented?

a)

mitosis and body cells

b)

mitosis and sex cells

c)

meiosis and body cells

d)

meiosis and sex cells

43.

Which type of reproduction in pea plants would provide more genetic diversity (differences) in the offspring?

a)

self-pollination

b)

cross- pollination

44.

What process is being shown in step #5?

a)

Mitosis

b)

Meiosis

c)

fertilization

d)

birth

45.

One cell in a cow goes through the process of Mitosis. How many chromosomes will be found in the newly formed cells?

a)

60

b)

30

c)

120

d)

0

46.

How many chromosomes will a female sheep pass onto her offspring?

a)

54

b)

108

c)

27

d)

2

47.

The arrow in the image is showing.....

a)

a genotype

b)

a phenotype

c)

a mutation

d)

fertilization

48.

A human cell that contains ALL of the information necessary for the growth and development of a complete organism could be found in......

a)

a sperm cell

b)

a skin cell

c)

an egg cell

49.

"A" is pointing at.....

a)

a chromosome

b)

an entire DNA molecule

c)

an antibody

d)

a gene

50.

The image shows four cats (from the same litter) with differences in their coloring and patterns. These differences are most likely due to.....

a)

dietary habits (what they eat)

b)

sexual reproduction

c)

damage from disease

d)

different viruses

51.

Between which two stages does Mitosis first occur?

a)

between A and B

b)

between B and C

c)

between C and D

d)

between D and E

52.

What percentage of the offspring will show round seeds?

a)

0%

b)

25%

c)

50%

d)

100%