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Worksheets

Heredity

Total questions: 35

Worksheet time: 24mins

Name
Class
Date
1.

Dominant alleles are written with:

a)

Upper case always

b)

Lower case always

2.

Recessive alleles are written with:

a)

Upper case always

b)

Lower case always

3.

TT and Tt are both

a)

Dominant

b)

Recessive

c)

Both

d)

None

4.

If black phenotype is dominant in guinea pigs then its genotype will be

a)

BB

b)

Bb

c)

bb

d)

Both BB and Bb

5.

If white phenotype is recessive then its genotype will be

a)

aa

b)

AA

c)

Aa

d)

None of the above

6.

Select the recessive genotype

a)

TT

b)

Tt

c)

tt

d)

None

7.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
8.
different forms of the same gene are called
a)
alleles
b)
genetics
c)
p generation
d)
law of segregation
9.
the physical characteristics that result from genes
a)
phenotype
b)
genotype
c)
heterozygous
d)
homozygous
10.
What is a recessive allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
11.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
12.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
13.

Which of the following is heterozygous?

a)

FF

b)

tt

c)

Gg

d)

RR

14.

Which of the following is homozygous dominant?

a)

Jj

b)

Rr

c)

MM

d)

ee

15.
The two-letter code that describes the genetic traits of an organism is called a-
a)
Phenotype
b)
Genotype
c)
Physical Appearance
d)
Intelligence
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.

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

21.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
22.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
23.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
24.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
25.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
26.
What should students use to identify the percent chance of a trait being passed down from a parent to its offspring?
a)
a graph
b)
a flow chart
c)
a data table
d)
a Punnett square
27.

Which of the following is homozygous dominant?

a)

RR

b)

Rr

c)

rr

28.
What did Gregor Mendel use to discover the principles that rule heredity?
a)
Pea Plant
b)
Pigeons
c)
Pear trees
d)
Photosynthesis
29.

Gregor Mendel is known as the father of _________

a)

Modern Medicine

b)

Father of the Green Revolution

c)

Father of Genitics

d)

The Pea Plant Man

30.

What was Mendel's first conclusion?

a)

Pea plants were inheriting a pair of genetic instructions from both parents.

b)

Pea plants were inheriting genetic instructions from their grandparents.

c)

Pea plants were inheriting genetic instructions only from their maternal parent.

d)

Pea plants were inheriting genetic instructions only from their paternal parent

31.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

32.

This is an example of ---

a)

Incomplete dominance

b)

Codominance

33.

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

a)

Incomplete Dominance

b)

Codominance

34.

When one allele is not dominant over the other, resulting in both traits expressed together in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

35.

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

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