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Genetics - AP Bio

Total questions: 76

Worksheet time: 59mins

Name
Class
Date
1.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
2.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
3.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
4.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
5.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
6.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
7.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
8.
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
9.
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%
10.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

11.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

12.

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

13.
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%
14.
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
15.

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%

16.
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.
17.
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
18.
This is an example of
a)
Complete dominance
b)
Mendelian Genetics
c)
Codominance
d)
Incomplete Dominance
19.
 One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.
a)
100%
b)
75%
c)
50%
d)
25%
20.
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.
21.

Who is considered the "father" of modern genetics?

a)

Einstein

b)

Mendel

c)

Disney

d)

Washington

22.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous 
23.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
24.
Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
25.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
26.
"The Great White Shark was 20 feet in length.  Phenotype or Genotype?
a)
phenotype
b)
genotype
27.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
28.
A physical characteristic that can be passed from parent to offspring.
a)
behavior
b)
trait
c)
strong muscles
d)
ability to fly a plane.
29.

Alternant or different genes that code for the same trait are called?

a)

chromosomes

b)

segments

c)

alleles.

d)

homozygous.

30.

What plant did Mendel study?

a)

pea plant

b)

spinach

c)

carrots

d)

sunflowers

31.

Which of the following alleles is homozygous (purebred) recessive?

a)

TT

b)

Tt

c)

tt

d)

ts

32.

Red (R) is dominant over white (r). How can a flower be white?

a)

It can have RR and be white.

b)

It has to have rr.

c)

It has to have rR

d)

There is no way it can be white until the third generation.

33.

Which of the following is an inheritable genetic trait?

a)

language

b)

type of music you like

c)

eye color

d)

slow growth due to insufficient nutrition.

34.
Females-XX; MalesXY.  A couple has 4 girls.  What is the chance the next child will be a boy?
a)
75%
b)
100%
c)
25%
d)
50%
35.

A single cross such as flower color, is call

a)

monohybrid

b)

crossing over

c)

dihybrid

d)

homozygous

36.

Which of the following is homozygous recessive

a)

Rr

b)

RR

c)

rr

d)

all of them

37.

Which term describes the different forms of a gene

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

38.

This image shows a_____

a)

Punnett Squre

b)

PHenotype

c)

Pedigree

d)

Homozygous Dominate genotype

39.

A phenotype is

a)

Dominance

b)

Physical appearance

c)

Recessiveness

d)

Letter Combinations

40.

What is an allele?

a)

A gene

b)

A genotype

c)

A phenotype

d)

Different forms of a gene

41.

Having two of the same genes for the same trait

a)

heterozygous

b)

chromosome

c)

protein

d)

homozygous

42.

Which of the following is a phenotype

a)

bb

b)

Bb

c)

BB

d)

blue eyes

43.

Having two different genes for a trait is called

a)

homozygous

b)

heterozygous

c)

protein

d)

genotype

44.

Which of the following genotypes would be considered heterozygous?

a)

BB

b)

gg

c)

Ff

d)

TT

45.

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

a)

genotypes

b)

phenotypes

46.

If something is heterozygous, it is also _____

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

47.

If something is homozygous, it can also be called____

a)

phenotype

b)

genotype

c)

hybrid

d)

purebred

48.

Gregor Mendel removed the male parts from the flowers of some plants in order to

a)

prevent hybrids from forming.

b)

prevent cross-pollination.

c)

stimulate self-pollination.

d)

control crosses between plants.

49.

When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited

a)

one allele from each parent.

b)

two alleles from each parent.

c)

three alleles from each parent.

d)

four alleles from each parent.

50.

The principles of probability can be used to

a)

predict the traits of the offspring of genetic crosses.

b)

determine the actual outcomes of genetic crosses.

c)

determine which species should be used in genetic crosses.

d)

decide which organisms are best to use in genetic crosses.

51.

Organisms that have two identical alleles for a particular trait are said to be

a)

hybrid.

b)

homozygous.

c)

heterozygous.

d)

dominant.

52.

Gregor Mendel’s principles of genetics apply to

a)

plants only.

b)

animals only.

c)

pea plants only.

d)

all organisms.

53.

Roan cattle show co-dominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead?

a)

It would be red.

b)

It would be white.

c)

It would be spotted.

d)

It would be pink.

54.

Variation in human skin color is an example of

a)

incomplete dominance.

b)

codominance.

c)

polygenic traits.

d)

multiple alleles.

55.

If an organism’s diploid number is 12, its haploid number is

a)

12

b)

6

c)

24

d)

3

56.

Gametes are produced by the process of

a)

mitosis.

b)

meiosis.

c)

crossing-over.

d)

replication.

57.

What is occurring in the figure?

a)

independent assortment

b)

anaphase I of meiosis

c)

crossing-over

d)

replication

58.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
59.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
60.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
61.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
62.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
63.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
64.
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
65.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
66.
A corn plant heterozygous 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
67.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
68.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
69.
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%
70.

A gene is

a)

a section of DNA

b)

a chemical found in the nucleus of cells

c)

contains instructions for building a protein

d)

all of the above

71.

A nucleotide consists of

a)

DNA

b)

adenine and thymine

c)

A phosphate, sugar and nitrogenous base

d)

genes

72.

In a DNA molecule, nucleotides are linked together to make up a single strand of DNA then bonded to a second strand. This structure is known as a

a)

RNA

b)

double helix

c)

watson-crick

d)

double nucleotide

73.

In a double strand of DNA, the nitrogen bases only pair in a certain combination. Which combination is correct?

a)

A-C and T-G

b)

C-T and A-G

c)

A-T and G-C

d)

A-A C-C

74.

During meiosis, one parent cell gives rise to how many daughter cells?

a)

1

b)

2

c)

3

d)

4

75.

A stand of DNA contains the following bases AGCTATAC

What would be the bases on the complementary strand?

a)

AGCTATAC

b)

TCGATATG

c)

TGCTTATG

d)

CTAGCGCT

76.

Human gametes contain how many chromosomes?

a)

46

b)

23

c)

12

d)

28

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