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WorksheetsGenetics unit review
Total questions: 33
Worksheet time: 24mins
Name
Class
Date
1.
the genetic makeup of an organism
a)
heterozygous
b)
punnet square
c)
genotype
2.
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
3.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
4.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
5.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
6.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
7.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
8.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
9.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
10.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
11.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
12.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
13.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
14.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
15.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
16.
What are the four nitrogen bases?
a)
adenine, thymine, guanine, cytosine
b)
adenine, lysine, prolene, guanine
c)
arganine, cytosine, lysine, purine
d)
lysine, cytosine, lucine, guanine
17.
What is a gene?
a)
A protein
b)
A section of DNA that tells our bodies how to build proteins
c)
Part of the DNA alphabet
d)
All of these
18.
What are proteins made of?
a)
amino acids
b)
chromosomes
c)
DNA
d)
Genes
19.
A change in a gene or chromosome is called a
a)
mitochondrial change
b)
mutation
c)
evolution
d)
mistake
20.
What is the connection between genes and DNA?
a)
DNA is found on genes
b)
Genes are made of DNA
c)
They are the same thing
21.
These are the building blocks of proteins
a)
genes
b)
DNA alphabet
c)
amino acids
d)
chromosomes
22.
Mutations can cause an incorrect protein to be produced which can result in a different _______.
a)
trait
b)
appearance
c)
DNA sequence
d)
all of these
23.
In what type of cells do mutations that are passed on to offspring occur?
a)
body cells
b)
brain cells
c)
sex cells
24.
Colorblindness is an X-linked disorder. Can a male ever be a carrier for this disorder?
a)
Yes
b)
No
25.
Allison's father was colorblind. She realizes that she received his defective X-chromosome. However, she is not color blind. She is a what?
a)
Carrier
b)
Colorblind female
c)
Non-carrier
d)
Incapable of seeing purple
26.
A colorblind father has four sons. What is the probability that he will pass his defective colorblindness gene onto one of his four sons?
a)
0%
b)
25%
c)
50%
d)
100%
27.
A male's sex chromosomes are...
a)
X Y
b)
X X
28.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
29.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
30.
Humans with genetic diseases can have a gene inserted into their body using a virus. This is called:
a)
Gene therapy
b)
Cloning
c)
DNA fingerprinting
31.
Crossing two individuals that have similar desirable characteristics is called ______________.
a)
cloning
b)
genetic engineers
c)
gene therapy
d)
inbreeding
32.
Evidence shows that the wolf is the ancestor to all of the breeds of dogs shown below. How did this variation arise in a relatively short period of time?
a)
A. Genetic manipulation
b)
Natural selection
c)
Random chance
d)
Selective breeding
33.
What term is used to express creating an identical copy of a gene or organism?
a)
hybridization
b)
inbreeding
c)
cloning
d)
gene splicing
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