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LT: Patterns of Inheritance

Total questions: 45

Worksheet time: 53mins

Name
Class
Date
1.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
2.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
3.
Which of the following is a heterozygous dominant genotype? 
a)
GG
b)
gg
c)
GGG
d)
Gg
4.
In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?
a)
white and purple
b)
white 
c)
purple
d)
lavendar
5.
Dominant alleles are represented by a(n)
a)
phenotype
b)
lower case letter
c)
upper case letter
d)
punnett square 
6.
D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
7.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
8.
Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?
a)
RR
b)
Rr
c)
rr
9.
If two purebred species (BB) are crossed, what percentage of their offspring would be BB?
a)
25%
b)
50%
c)
75%
d)
100%
10.
Short hair (S) is dominant to long hair (s).
What is the genotype for an offspring with long hair?
a)
SS
b)
Ss
c)
ss
11.
What percentage of the offspring will be heterozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%
12.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
13.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
14.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
15.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
16.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
17.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
18.
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%
19.
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
20.

What is the description for the following: AA

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

d)

Heterozygous Dominant

21.

What is the description for the following: Aa

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

d)

Heterozygous Dominant

22.

What is the description for the following: aa

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

d)

Heterozygous Dominant

23.

If brown fur is dominant and white fur is recessive what is the phenotype of the following Rabbit: AA

a)

Brown

b)

White

c)

Speckled

d)

Spotted

24.

If brown fur is dominant and white fur is recessive what is the phenotype of the following Rabbit: Aa

a)

Brown

b)

White

c)

Speckled

d)

Spotted

25.

If brown fur is dominant and white fur is recessive what is the phenotype of the following Rabbit: aa

a)

Brown

b)

White

c)

Speckled

d)

Spotted

26.

What are the offspring's possible phenotypes?

Brown fur is dominant. White fur is recessive.

One parent is homozygous for brown fur as the other is heterozygous.

a)

100% White fur

b)

50% Brown fur 50% White fur

c)

100% Brown fur

d)

75% Brow fur 25% White fur

27.

What are the offspring's possible phenotypes?

Brown fur is dominant. White fur is recessive.

One parent is homozygous for white fur as the other is heterozygous.

a)

100% White fur

b)

50% Brown fur 50% White fur

c)

100% Brown fur

d)

75% Brow fur 25% White fur

28.

What are the offspring's possible phenotypes?

Brown fur is dominant. White fur is recessive.

Both parents were heterozygous with brown fur.

a)

100% White fur

b)

50% Brown fur 50% White fur

c)

100% Brown fur

d)

75% Brow fur 25% White fur

29.

What are the offspring's possible phenotypes?

Brown fur is dominant. White fur is recessive.

Both parents have white fur.

a)

100% White fur

b)

50% Brown fur 50% White fur

c)

100% Brown fur

d)

75% Brow fur 25% White fur

30.
Tall is dominant to short. A homozygous tall plant is crossed with a short plant. What will be the phenotypes of the offspring?
a)
100% tall
b)
50% tall, 50% short
c)
75% tall, 25% short
d)
25% tall, 75% short
31.
Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?
a)
100% Gg
b)
50% GG, 50% Gg
c)
25% GG, 50% Gg, 25% gg
d)
75% Gg, 25% gg
32.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
33.
Recessive alleles may not be expressed because they are
a)
masked by a dominant allele
b)
the least common allele in a population.
c)
the most common allele in a population.
d)
less likely to have crossing over.        
34.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
35.
B=brown eyes
b= blue eyes
What is true about these 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
36.
T = tall an t = short
TT and Tt would result in  the following phenotype
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
37.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
38.
B=brown eyes
b= blue eyes
What is true about these 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
39.
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
40.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
41.
In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
What would the cross be for two heterozygous guinea pigs?
a)
BB X BB
b)
BB X Bb
c)
Bb X Bb
d)
bb X bb
42.
Smooth seeds are dominant over wrinkled seeds.
What is the genotype ratio for the following cross?
Nn X NN
a)
NN = 100%, Nn = 0%, nn = 0%
b)
NN = 50%, Nn = 25%, nn = 25%
c)
NN = 50%, Nn = 50%, nn = 0%
d)
NN = 25%, Nn = 50%, nn = 25%
43.
Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what are the expected phenotype percentages for the offspring of a heterozygous hairy plant and a hairless plant?
a)
100% hairy, 0% hairless
b)
75% hairy, 25% hairless
c)
50% hairy, 50% hairless
d)
25% hairy, 75% hairless
44.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)
Ry
b)
RRyy
c)
RrYy
d)
Rryy
45.
In guinea pigs, black hair is dominant to white hair and short hair is dominant to long hair. What would be the phenotype of a guinea pig with the genotype Bbss?
a)
Black hair, long hair
b)
Black hair, short hair
c)
White hair, long hair
d)
White hair, short hair

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