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Punnett and Pedigree

Total questions: 48

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
A characteristic that an organism can pass on to its offspring through its genes is ___________
a)
Trait
b)
Gene
c)
Allele
d)
Dominant
2.
An allele that is masked when a dominant allele is present. The "weaker" gene. 
a)
Dominant Allele
b)
Recessive Allele
3.
An allele whose trait always shows up in the organism when the allele is present. The "stronger" gene. 
a)
Dominant Allele
b)
Recessive Allele
4.
An organism’s genetic makeup or allele combination.
a)
Genotype
b)
Phenotype
c)
Beanotype
d)
Notype
5.
An organism’s physical appearance, or visible traits. 
a)
Genotype
b)
Phenotype
c)
Beanotype
d)
Notype
6.
What is called when a organism has  two different alleles for a trait. Tt or Rr
a)
Heterozygous
b)
Homozygous
c)
Domozygous
d)
Thermozygous
7.
What is called when a organism has two identical alleles for a trait. TT or tt. RR or rr
a)
Heterozygous
b)
Homozygous
c)
Domozygous
d)
Thermozygous
8.
Punnett squares can be used to predict the probability of:
a)
being exposed to a contagious disease and contracting it
b)
having an inherited disease or a genetically determined physical trait
c)
Both
9.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
10.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
11.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
12.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
13.
Which of the following is a phenotype?
a)
Aa
b)
black hair
c)
heterozygous genes
d)
mutated DNA
14.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
15.
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%
16.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
17.
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%
18.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
19.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
20.
What is a punnett square?
a)
graph used to predict the possible genotypes of offspring in a given cross
b)
a graph used to predict the possible birth rate of offspring.
c)
a graph used to predict the possible behavioral characteristics an offspring could have
d)
None of the above
21.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
22.

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

a)

0%

b)

25%

c)

50%

d)

75%

23.

Each one of the boxes on the Punnett square represents what probability of an offspring's genotype?

a)

25%

b)

1%

c)

10%

d)

0%

24.
A tall plant (TT) is crossed with a tall plant (Tt). What is the phenotype of the offspring?
a)
50% homozygous dominant; 50% heterozygous; 100% tall
b)
100% homozygous dominant; 100% tall
c)
25% homozygous dominant; 75% heterozygous; 100% short
d)
50% homozygous dominant; 50% heterozygous; 100% short
25.
A red flower (Rd) is crossed with a white flower (rr). What is the genotype of the offspring? Draw a Punnett square and answer this question.
a)
50% heterozygous; 50% homozygous dominant
b)
100% homozygous dominant
c)
100% homozygous recessive
d)
50% heterozygous; 50% homozygous recessive
26.
Two heterozygous white (brown fur is recessive) rabbits are crossed. What is their genotype?
a)
25% homozygous domestic; 25% homozygous recessive; 50% heterozygous
b)
50% homozygous dominant; 50% heterozygous
c)
25% homozygous domestic; 75% homozygous recessive
27.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
28.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
29.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
30.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
31.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
32.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
33.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
34.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
35.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
36.
What is this?
a)
Pedigree
b)
Karyotype
c)
Venn diagram
d)
Punnett Square
37.
A carrier is represented by what symbol? 
a)
Clear 
b)
Shaded 
c)
Half Shaded
d)
1:4 ratio 
38.
If a trait SKIPS a generation, it is an indication that the trait is....
a)
dominant
b)
recessive
c)
incompletely dominant
d)
co-dominant
39.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the father (square) in generation 1?

a)

Aa

b)

AA

c)

aa

d)

A?

40.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What is the phenotype of the father (square) in generation 1?

a)

Brown

b)

Blue

c)

1 blue, 1 brown

41.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What are the genotypes of the parents (1&2) in generation 2?

a)

Aa, AA

b)

aa, aa

c)

AA, AA

d)

Aa, Aa

42.

A pedigree chart tracks ________ specific trait(s).

a)

one

b)

two

c)

three

d)

15

43.

There are no differences between family trees and pedigree charts.

a)

true

b)

false

c)

Who knows?

d)

Who cares?

44.

A horizontal line in a pedigree chart between two parents represents

a)

mating (reproduction)

b)

best friends

c)

frenemies

d)

offspring

45.

A male with brown eyes has homozygous genes and is part of a pedigree chart for brown eyes. Which symbol would he have?

a)

fully shaded circle

b)

fully shaded square

c)

empty circle

d)

empty square

e)

half-shaded square

46.

What is the genotype of individual IV – 2?

a)

HH

b)

HY

c)

hh

d)

Yh

47.

Pedigrees are used to

a)

determine genotypes based on phenotypes.

b)

trace the family history of a chromosomal disorder.

c)

Predict the probable occurrence of a genetic disorder in offspring.

d)

all of the above.

e)

only answers b and c.

48.

Whose chromosome determines the sex of babies in humans?

a)

Father

b)

Mother

c)

Both

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