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GREGOR MENDEL AND GENETICS

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

Who is Gregor Mendel

a)

an Austrian Monk from the mid 1800s who contributed to the study of Genetics

b)

The scientist who discovered the structure of DNA

c)

a British scientist who discovered penicillin

d)

The scientist who used X-Ray Crystallography to shed light on the structure of DNA

2.

What did Gregor Mendel study?

a)

Mold Spores

b)

Pea Plants

c)

Sun Flowers

d)

Rats

3.

an observable characteristic

a)

trait

b)

personality

c)

cell

d)

DNA

4.

When an organism has two of the same alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

5.

When an organism has two different alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

6.

______ is the set of genes possessed by someone

a)

Karyotype

b)

Fingerprint

c)

Genotype

d)

Phenotype

7.

Humans have _______ pairs of chromosomes, for a total of _______ chromosomes.

a)

10, 20

b)

25, 100

c)

23, 46

d)

46, 92

8.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
9.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
10.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
11.
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%
12.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
13.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
14.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
15.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 
a)
50 % Brown Hair and 50% Blond Hair 
b)
25 % Brown Hair and 75% Blond Hair 
c)
75 % Brown Hair and 25% Blond Hair 
d)
0% Brown Hair and 100% Blond Hair 
16.
What is a dominant 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
17.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
18.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
19.

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

a)

25%

b)

50%

c)

75%

d)

100%

20.
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%

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