WorksheetsGenetics Test Review
Total questions: 36
Worksheet time: 18mins
Name
Class
Date
1.
A trait that can be covered up and seems to disappear is known as a(n) _____________ trait.
a)
Dominant
b)
Gene
c)
Allele
d)
Recessive
2.
_________________ is the genetic makeup or combination of alleles in an organism.
a)
Phenotype
b)
Genotype
c)
Heredity
d)
Chromosome
3.
The ________________ allele covers up the other form of a trait.
a)
Recessive
b)
Dominant
4.
The outward, physical appearance of an organism due to its genotype is a(n)
a)
Phenotype
b)
Genotype
c)
Dominant Trait
d)
Recessive Trait
5.
When neither allele covers the other and a third phenotype appears it is called
a)
Codominance
b)
Incomplete Dominance
c)
Impossible
d)
A miracle!
6.
What happens when there are more than two alleles that make up a particular trait?
a)
Selective Breeding
b)
Multiple Alleles
c)
Purebred
d)
Heredity
7.
When the same gene for a particular trait is found on more than just one pair of chromosomes, the trait is passed on through what?
a)
Multiple Alleles
b)
Hybrids
c)
Selective Breeding
d)
Polygenic Inheritance
8.
Organisms with homozygous genotypes are called
a)
Purebreds
b)
Hybrids
c)
Phenotypes
d)
Genes
9.
Organisms that are heterozygous for a trait are called what?
a)
Purebreds
b)
Hybrids
c)
Genotypes
d)
Alleles
10.
What is it called when organisms are bred to bring out specific traits?
a)
Incomplete Dominance
b)
Multiple Alleles
c)
Polygenic Inheritance
d)
Selective Breeding
11.
The study of how traits are inherited through the actions of alleles is what?
a)
Selective Breeding
b)
Incomplete Dominance
c)
Genetics
d)
Heredity
12.
What is a section of DNA that contains instructions to make specific proteins that control how an organism develops is a(n)?
a)
Gene
b)
Hybrid
c)
Polygenic Inheritance
d)
Heredity
13.
Which process creates two haploid cells that are used during sexual reproduction?
a)
Meiosis
b)
Mitosis
14.
Which process is used for asexual reproduction in most of our body cells and creates two diploid cells?
a)
Meiosis
b)
Mitosis
15.
A cancer mutation can best be described as what?
a)
Disease that only occurs on the skin
b)
Disease that only affects a person's appearance
c)
Something that results in uncontrolled growth of cells
d)
I have no idea
16.
Parents give one of each of these to their offspring
a)
Chromosomes
b)
Alleles
c)
A pat on the head
d)
A sock
17.
What is Mendel's ratio of dominant to recessive?
a)
1:5
b)
2:3
c)
3:1
d)
3:2
18.
Males have how many X chromosomes
a)
1
b)
4
c)
18
d)
2
19.
What a disease or condition that comes as a result from a mutation?
a)
DNA
b)
Genetic Disorder
c)
Genetic Alteration
d)
I have no idea
20.
What nitrogenous base always pairs with adenine?
a)
cytosine
b)
guanine
c)
thymine
21.
What nitrogenous base pairs with guanine?
a)
adenine
b)
thymine
c)
cytosine
22.
Who discovered that DNA is made up of 2 chains of molecules arranged in a spiral form?
a)
Erwin Chargaff
b)
Watson & Crick
c)
Rosalind Franklin
d)
Gregor Mendel
23.
Who constructed the first model of DNA (known as the Double Helix) and won the Nobel Peace Prize
a)
Watson & Crick
b)
Rosalind Franklin
c)
Erwin Chargaff
d)
Gregor Mendel
24.
Who discovered the the amount of adenine in DNA always equals the amount of thymine?
a)
Rosalind Franklin
b)
Watson & Crick
c)
Erwin Chargaff
d)
Mendel
25.
When there is incomplete dominance...
a)
one allele has more influence than the others
b)
Each allele has its own degree of influence
c)
the alleles have no influence
d)
There are no alleles present
26.
Which of the following is not an example of a polygenic trait?
a)
Hair Color
b)
Eye Color
c)
Pea pod color
d)
Skin Color
27.
True or False: Blood type is not an example of multiple alleles
a)
True
b)
False
28.
Cystic fibrosis is an example of what kind of genetic disorder?
a)
Autosomal Dominant Disorder
b)
Autosomal Recessive Disorder
c)
Sex-Linked Disorder
d)
Genetic Disorder
29.
Gregor Mendel earned which title as a result of his findings?
a)
Father of Pea Plants
b)
Father of Confusing Things
c)
Father of Genetics
d)
Father of Thor
30.
True or False: Gregor Mendel found that each trait has two sets of instructions, one from each parent
a)
True
b)
False
31.
What shows the inheritance pattern of a trait through 2 or more generations?
a)
Family Tree
b)
Pedigree
c)
Genetic Triangle of Families
d)
Your Domestic Shrub
32.
What do we call chromosomes that carry the same set of genes ( alleles for the same characteristics)?
a)
Same Genes
b)
Homologous Chromosomes
c)
Similar Chromosomes
d)
Homologous Heredity
33.
If Mendel's ratio is 3:1, what would the percentage be for the recessive?
a)
0%
b)
25%
c)
50%
d)
75%
34.
Which of the following is an example of an inherited trait?
a)
A scar on your knee
b)
Very tan & freckled skin
c)
Hitch-hikers thumb
d)
Short hair
35.
Genes are segments of DNA that are located on the what of each cell?
a)
mitochondria
b)
membrane
c)
Chromosome
d)
Chloroplast
36.
In Sneetches, the allele for purple eyes is recessive to the allele for blue eyes. How is it possible that two parents with blue eyes could have a child with purple eyes?
a)
One parent must hace had only purple eyed parents
b)
Mutations after fertilization could alter gene sequences and change alleles
c)
Eye color is a sex-linked trait and male children could have only the allele for purple eyes
d)
Each parent must be carrying the recessive allele for blue eyes
100 %
