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genetics

Total questions: 45

Worksheet time: 39mins

Name
Class
Date
1.
Two Alleles make a 
a)
Gene
b)
Chromosome
c)
DNA
d)
Phenotype
2.
An Organism's physical appearance is its
a)
Genotype
b)
Phenotype
c)
Chromosome
d)
Allele
3.
A gene with two of the same alleles (DD or aa) is considered a __________ gene.
a)
Genotype
b)
Hybrid
c)
Gene
d)
Purebred
4.
A gene with a mix of alleles (Bb) is considered a _________ gene.
a)
Purebred
b)
Hybrid
c)
Homozygous
d)
Punnett
5.
Phenotype is 
a)
The number of Chromosomes
b)
Physical apperance determined by the alleles
c)
Number genes
d)
The particular alleles or letter combination
6.
Genotype is 
a)
The number of Chromosomes
b)
Physical apperance determined by the alleles
c)
Number genes
d)
The particular alleles or letter combination
7.
Select the answer that shows only Genotypes
a)
Gg, Green
b)
DD, Ff
c)
Tall, Blue
d)
Ss, Square
8.
Select the answer that shows only Phenotypes.
a)
Gg, Green
b)
DD, Ff
c)
Tall, Blue
d)
Ss, Square
9.

Tt, BB, rr

a)

genotype

b)

phenotype

10.

blue eyes, curly hair

a)

genotype

b)

phenotype

11.

purebred; the same gene pair

a)

homozygous

b)

heterozygous

12.

the different forms of a trait that make up a gene, R OR r

a)

allele

b)

dominant

c)

recessive

13.

the weaker trait; you need 2 genes for the trait to show up in an organism

a)

dominant

b)

recessive

14.

Rr, Ff

a)

homozygous

b)

heterozygous

15.

BB, RR, TT

a)

heterozygous

b)

homozygous dominant

c)

homozygous recessive

16.

nn, ww, gg

a)

heterozygous

b)

homozygous dominant

c)

homozygous recessive

17.

Tt, Bb, Ww

a)

heterozygous

b)

homozygous dominant

c)

homozygous recessive

18.

CC, DD, EE

a)

heterozygous

b)

homozygous dominant

c)

homozygous recessive

19.

aa, bb

a)

heterozygous

b)

homozygous dominant

c)

homozygous recessive

20.
A trait that disappears when paired with a trait that "takes over."
a)
Purebred
b)
Hybrid
c)
Dominant
d)
Recessive
21.
This type of allele is represented by a capital letter and it controls the trait that always shows up in an organism
a)
recessive allele
b)
reproductive allele
c)
sex chromosome
d)
dominant allele
22.
This type of allele is covered up whenever the dominant allele is present and is represented by a lower case letter
a)
dominant allele
b)
recessive allele
c)
codominance
d)
sex chromosome
23.
Which term has the same meaning as heterozygous?
a)
purebred
b)
homozygous
c)
hybrid
d)
allele
24.
Which term has the same meaning as purebred?
a)
homozygous
b)
heterozygous
c)
allele
d)
zygote
25.
Two alleles are identical; example TT or tt =
a)
purebred or homozygous
b)
heterozygous
c)
traits
d)
phenotypes
26.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
27.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
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 the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
30.

What goes in box 3

a)

Aabb

b)

AABB

c)

AAbb

d)

aaBb

31.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
32.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
33.

how many offsprings are heterozygous for both traits

a)

4

b)

8

c)

0

d)

16

34.
What proportion of the offspring in Figure 11-4 would be expected to have white, smooth hair?
a)
9/16
b)
3/16
c)
4/16
d)
1/16
35.

A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.

This cross would be

a)

BBEE x bbee

b)

BBEe x BbEe

c)

BbEE x BbEe

d)

BBee x BBEE

36.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
37.
parent 1: GgBB
parent 2: ggBb
Find the gametes for parent 1.
a)
GB, GB, gB, gB
b)
gB, gb, gB, gb
c)
Gg, BB, GB, GB
d)
gg, Bb, gB, gb
38.
Which of the following identifies the gametes?
a)
A
b)
B
c)
C
d)
D
39.
Which of the following identifies the phenotypes?
a)
A
b)
B
c)
C
d)
D
40.
Cross foliating these letters would give us what four combination
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
41.

What goes in box 1

a)

AABb

b)

ABAB

c)

abab

d)

AbaB

42.

What goes in box 2

a)

AbAB

b)

AaBb

c)

abab

d)

AABB

43.

What goes in box 16

a)

AABB

b)

AaBB

c)

AaBb

d)

BBaa

44.
If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes?
a)
GB, Gb, gB, gb
b)
GB, GB, gb, gb
c)
Gb, Gb, Gb, GB
d)
GG, BB, gg, bb
45.

How many are recessive for both traits

a)

0

b)

1

c)

2

d)

4

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