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Genetics Quiz 1 Review

Total questions: 20

Worksheet time: 30mins

Name
Class
Date
1.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
2.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
3.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
4.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
5.
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%
6.
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
7.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
8.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
9.

Identify the homozygous dominant genotype:

a)

FF

b)

Ff

c)

ff

d)
10.

Which of these is homozygous recessive?

a)

Rr

b)

RR

c)

Ba

d)

bb

11.

An organism's physical appearance or visible traits. (what it looks like)

a)

phenotype

b)

genotype

12.

What allele combination should go in the missing box?

a)

aa

b)

AA

c)

Aa

d)

None

13.

Which of the following genotypes is heterozygous?

a)

GG

b)

hh

c)

T

d)

Aa

14.

Match the following.

a)

genes are the same

1.

homozygous

b)

genes are different

2.

heterozygous

c)

T - tall

3.

dominant allele

d)

t - short

4.

recessive allele

e)

the study of heredity

5.

genetics

15.

Match the following

a)

homozygous dominant genes

1.

AA

b)

heterozygous dominant genes

2.

Hh

c)

homozygous recessive genes

3.

bb

d)

genetic material of an orgnism (DNA)

4.

genotype

e)

physical characteristics of an organism

5.

phenotype

16.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
17.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
18.
What is the mode of inheritance shown here?
a)
Sex Linked Recessive
b)
Autosomal Dominant
c)
Autosomal Recessive
d)
Sex Linked Dominant
19.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
20.

The pedigree is showing a _____________ trait.

a)

autosomal dominant

b)

autosomal recessive

c)

sex linked recessive

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