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Genetics Review

Total questions: 32

Worksheet time: 47mins

Name
Class
Date
1.


In the Punnett Square below, which genotype belongs in the missing square?

a)
tt
b)
Tt
c)
Bb
d)
TT
2.
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%
3.

What is the probability that the offspring will express the dominant trait?

a)

25%

b)

50%

c)

75%

d)

100%

4.

If a heterozygous tall pea plant is crossed with a short pea plant (recessive), 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
5.

What is the predicted percentage of homozygous recessive offspring in this cross?

a)

0%

b)

25%

c)

50%

d)

75%

6.

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

7.
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
8.

Red is incompletely dominant to white in snapdragons. Which cross would result in 100% pink flowers?

a)

RR x rr

b)

rr x rr

c)

Rr x Rr

d)

RR x RR

9.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
10.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
11.
In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?
a)
100%
b)
75%
c)
50%
d)
25%
12.
In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is
a)
 25%
b)
 75%
c)
100%
d)
0%
13.

A newly wedded alien couple are dreaming of their future family, and wondering what their children might look like. The future father is purebred for his big nose, but hybrid for red eyes, while the future mother is heterozygous for her big nose and has pink eyes. Which is the genotype of the father?

a)

BBRr

b)

bbRr

c)

BbRr

d)

Bbrr

14.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 
a)
0%
b)
25%
c)
50%
d)
100%
15.
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
16.

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

17.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

18.

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.


What is the genotype for a brown mouse?

a)

BB

b)

Bb

c)

bb

19.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
20.

If flower height follows incomplete dominance in a rose species, how tall would you expect a hybrid to be?

a)

tall

b)

medium

c)

a mix of tall and short

d)

a mix of tall and medium

21.

Cross a man with AB blood and a woman with O blood. What are the possible phenotypes of the offspring?

a)

A or O

b)

A or B

c)

B or O

d)

A, B or O

22.

In Andalusian fowls, black is dominant over white individuals. A Heterozygous individuals is grey following the incomplete dominance rule.  If you cross a black fowl with a white fowl, what is the phenotype ratio? (Dom:Het:Rec)

a)

4:0:0

b)

2:2:0

c)

0:4:0

d)

4:0

23.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
24.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
25.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb
26.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
27.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

a)

HH

b)

Hh

c)

hh

28.
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
29.
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
30.
Assume dad's gametes are on top, what is his genotype?
a)
AAPP
b)
AaPp
c)
aaPP
d)
Aapp
31.
Assume mom's gametes are on the left, what is her genotype?
a)
TTZz
b)
TtZz
c)
ttZZ
d)
TtZZ
32.
Question Image

Match the following

a)

Genotypes

1.

Aa, AA, aa

b)

Phenotypes

2.

Alto (tall), bajo (short)

c)

Homozygous Dominant

3.

AA

d)

Homozygous Recessive

4.

aa

e)

Heterozygous

5.

Aa

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