NEW
Font size
S
M
L
XL
WorksheetsGenetics Practice Test
Total questions: 35
Worksheet time: 33mins
Name
Class
Date
1.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
2.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
3.
What does this symbol represent in a Pedigree?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
4.
What does this symbol represent in a Pedigree?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
5.
Freckles (F) are dominant over nonfreckles. What is the phenotype of individual #3
a)
Ff
b)
ff
c)
freckles
d)
nonfreckles
6.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
Can't tell
7.
If this pedigree shows a recessive disorder, what MUST the genotype of individual in Generation II - Person 3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
8.
The prefix hetero means-
a)
same
b)
different
9.
Which answer choice is heterozygous?
a)
BB
b)
bb
c)
AA
d)
Aa
10.
DD
a)
homozygous dominant
b)
heterozygous
c)
homozygous recessive
d)
phenotype
11.
Yellow is dominant to white. What is the phenotype of this organism?
Yy
Yy
a)
Yellow
b)
white
12.
What is heredity?
a)
How different genes and traits are passed down from parents to children
b)
How different genes and traits are passed down from children to parents
c)
How traits are identical to parents
d)
How traits are different between siblings
13.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
14.
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
15.
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
16.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
17.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
18.
Which of the following is heterozygous
a)
Ww
b)
ii
c)
DD
d)
kk
19.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
20.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
21.
The physical appearance of a trait is known as the-
a)
genotype
b)
phenotype
c)
characteristics
d)
intelligence
22.
How many letters does a genotype contain?
a)
1
b)
2
c)
3
d)
4
23.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?
a)
Brown Hair
b)
Blonde Hair
c)
Brown and Blonde Hair
d)
Black Hair
24.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)
BB
b)
bb
c)
Bb
d)
bB
25.
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%
26.
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%
27.
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
28.
Jabba the Hutt has finally decided to settle down and have a family. He has undergone genetic testing and learned that he is heterozygous for Hutt Fungal Syndrome, which is caused by recessive alleles. He is worried that his children might suffer from this syndrome. His Hutt mate has undergone genetic testing and discovered she is homozygous dominant for the syndrome. Should Jabba be worried?
a)
Yes
b)
No
29.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
30.
Where is DNA in a eukaryotic cell?
a)
Cytoplasm
b)
Cell membrane
c)
Nucleus
d)
Vacuole
31.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
32.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
33.
A heterozygous white rabbit is crossed with a homozygous black rabbit. List the parent genotypes; draw and fill and Punnett square, and then list the offspring genotypes and phenotypes.
a)
genotype-25% heterozygous; 75% homozygous recessive and phenotype-50% white and 50% black
b)
genotype- 50% heterozygous; 50% homozygous recessive and phenotype- 50% white and 50% black
34.
Two heterozygous white (brown fur is recessive) rabbits are crossed. What is their genotype?
a)
25% homozygous domestic; 25% homozygous recessive; 50% heterozygous
b)
50% homozygous dominant; 50% heterozygous
c)
25% homozygous domestic; 75% homozygous recessive
35.
A homozygous tall plant (TT) is crossed with a heterozygous tall plant (Tt) (short is the recessive phenotype). What are the genotypes and phenotypes of the offspring?
a)
100% homozygous dominant; 100% tall
b)
50% homozygous dominant; 50% heterozygous and 100% tall
c)
25% heterozygous; 75% homozygous dominant and 100% tall
Reset
