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Punnett Squares Level 2

Total questions: 16

Worksheet time: 23mins

Name
Class
Date
1.

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%

2.

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%

3.

What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?

a)

0%

b)

25%

c)

50%

d)

75%

4.
Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?
a)
Red
b)
Blue
c)
Purple
d)
50% Red, 50% Blue
5.
Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?
a)
Leonardo
b)
Olivet
c)
Both
d)
Neither
6.
Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
7.
What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?
a)
Pp
b)
Purple
c)
White
d)
PP and pp
8.

If you cross two heterozygous traits (Rr x Rr), as Mendel did in his second experiment, what ratio will you get between offspring with the dominant and recessive phenotypes

a)

1:1

b)

2:1

c)

3:1

d)

4:1

9.

A trait that is NOT expressed when a dominant allele is present.

a)

Recessive

b)

Co-dominant

c)

Incomplete Dominant

d)

Dominant

10.
A trait that is expressed over other traits.
a)
Recessive
b)
Co-dominant
c)
Incomplete Dominant
d)
Dominant
11.

The likelihood that a specific event will occur:

a)

accountability

b)

dominant

c)

probability

d)

recessive

12.

A diagram used to predict the outcomes of a genetic cross:

a)

karyotype

b)

Punnett Square

c)

Pedigree

d)

Venn diagram

13.

When the two alleles of a particular gene are the same:

a)

homozygous

b)

genotype

c)

heterozygous

d)

phenotype

14.

Dominant alleles are represented with a:

a)

capital letter

b)

lower case letter

c)

shape

d)

symbol

15.

A detectable trait or traits that result from the genotype such as color, shape, etc:

a)

genotype

b)

homozygous

c)

heterozygous

d)

phenotype

16.

The passing of genetic traits from parents to offspring:

a)

geneology

b)

heredity

c)

cellology

d)

physiology