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Punnett squares simple

Total questions: 22

Worksheet time: 23mins

Name
Class
Date
1.
What determines gender in humans? 
a)
The X & Y chromosome
b)
chromosome 21
c)
codominance
d)
multiple alleles
2.
Which of these is heterozygous? 
a)
AA
b)
aa
c)
Aa
3.
Which of these is homozygous dominant? 
a)
AA
b)
aa
c)
AB
4.
Which of these is homozygous recessive? 
a)
AA
b)
aa
c)
AB
5.

How many SEX chromosomes does a normal human have?

a)

2

b)

12

c)

23

d)

46

6.
Long is dominant to short. If we cross two heterozygous longs, how many shorts will we have? 
a)
0%
b)
25%
c)
50%
d)
75%
7.

Which type of inheritance is represented in the problem below:


Green peas are dominant to yellow peas. A heterozygous pea crosses with a yellow pea. What percent of the offspring are yellow?

a)

Simple Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Blood Types

e)

Sex-Linked

8.

Which type of inheritance is represented in the problem below:


In hamsters, brown and white are equally expressed. A brown hamster crosses with a heterozygous hamster. What are the possible phenotypes of the offspring?

a)

Simple Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Blood Types

e)

Sex-Linked

9.

Which type of inheritance is represented in the problem below:


In some breeds of cows, the alleles for coat-colors are red (R) and white (W). A red cow crosses with a white cow. What are the possible phenotypes of the offspring?

a)

Simple Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Blood Types

e)

Sex-Linked

10.

Which type of inheritance is represented in the problem below:


Snapdragon flowers can be red, white, or pink. A red flower crosses with a pink flower. What are the possible phenotypes of the offspring?

a)

Simple Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Blood Types

e)

Sex-Linked

11.

Which type of inheritance is represented in the problem below:


A woman with Type A homozygous blood marries a man with Type O blood. What are the possible phenotypes of the offspring?

a)

Simple Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Blood Types

e)

Sex-Linked

12.

SELECT ALL THAT APPLY: Which of the following are alleles for blood type problems

a)

IA

b)

IB

c)

i

d)

iA

e)

IA IA

13.

Which of the following would be alleles for the problem below:


Colorblindness is a recessive sex-linked trait.

a)

Xb = colorblind

b)

XB = colorblind

c)

XB = normal vision

d)

Y

14.

Why do scientist use Punnett Squares?

a)

A tool scientist use to to see alleles

b)

A tool scientist use to see which alleles are dominant

c)

A tool scientist use to determine possible genotypes for offspring

15.

In a Punnett Square, 1 box is equal to 25%. How much are 3 boxes equal to?

a)

25%

b)

50%

c)

75%

d)

100%

16.

Fill in the Yellow Box

a)

AA

b)

Aa

c)

aa

17.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

18.

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

a)

0%

b)

25%

c)

50%

d)

100%

19.

What is the mother's genotype?

a)

DD

b)

Dd

c)

dd

20.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
21.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
22.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT