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WorksheetsGenetics Unit pre-Assessment
Total questions: 54
Worksheet time: 27mins
Name
Class
Date
1.
Genes are segments of
a)
DNA
b)
Protein
c)
Alleles
d)
Cells
2.
Different forms of genes are called
a)
alleles
b)
hybrids
c)
dominant factors
d)
recessive factors
3.
Every organisms has a _ that contains all of the biological information needed to build and maintain a living example of that organism.
a)
Protein
b)
Enzyme
c)
Genome
d)
Gamete
4.
The biological information contained in a genome is encoded in its
a)
Organism
b)
DNA
c)
RNA
d)
Amino Acids
5.
The sequence of DNA bases in a chromosome determines the sequence of
a)
amino acids in a protein
b)
nucleotides in a nucleic acid
c)
sugars in a carbohydrate
d)
molecules in a cell
6.
Inserting, deleting or substituting segments of DNA molecules can
a)
All of the above
b)
Alter a protein
c)
Alter a trait
d)
Alter a gene
7.
An altered gene that is passed on to every cell that develops from it will always damage the offspring's success in its environments.
a)
True
b)
False
8.
Gene mutations (when the occur in gametes ) can be passed on to offspring.
a)
True
b)
False
9.
Genes code for
a)
Protein
b)
Fats
c)
Other nucleic acids
d)
Carbohydrates
10.
The many body cells in an individual can be very different from one another, even though they are all descended from a single cell and thus have essentially identical genetic instructions.
a)
True
b)
False
11.
Different genes are active in different types of cells, influenced by the cell's environment and past history.
a)
True
b)
False
12.
The term _ describes a certain relationship between genes, where an allele of one gene hides or masks the visible output, or phenotype, of another gene.
a)
epistasis
b)
pleiotropy
c)
crosing over
d)
incomplete dominance
13.
Term that states that genes for different traits can segregate independently during the formation of gametes.
a)
Crossing Over
b)
Recombination
c)
Independent Assortment
d)
Incomplete Dominance
14.
Cases in which the heterozygous phenotype lies somewhere between two homozygous phenotypes is called _. For example, a dominant white flower and a dominant red flower would create a pink flower.
a)
Incomplete Dominance
b)
Codominance
c)
Polygenic traits
d)
Multiple Alleles
15.
The variety of skin color in humans comes about partly because more than 4 different genes control this trait. This is an example of
a)
Codominance
b)
Incomplete dominance
c)
multiple alleles
d)
polygenic traits
16.
_ occurs when one gene influences two or more seemingly unrelated phenotypic traits.
a)
Pleiotropy
b)
Epistasis
c)
Incomplete Dominance
d)
Transcription
17.
Concept of differentiation means although all cells have identical genetic information , different genes are active in different types of cells.
a)
True
b)
False
18.
All mutations are bad
a)
True
b)
False
19.
All mutations have an effect on an organisms phenotype.
a)
True
b)
False
20.
Every cell in an individual organism has a unique set of genetic material.
a)
True
b)
False
21.
Cloning only refers to making a copy of an entire organism.
a)
True
b)
False
22.
Male genes are always dominant.
a)
True
b)
False
23.
Female genes are always dominant.
a)
True
b)
False
24.
Dominant genes are always more frequent in a population.
a)
True
b)
False
25.
Chromosomes are either dominant or recessive.
a)
True
b)
False
26.
All dominant genes are adventageous.
a)
True
b)
False
27.
_ are diagrams that use mathematical probability to help predict the genotype and phenotype combinations in genetic crosses.
a)
Pedigrees
b)
Karyotypes
c)
Punnett Squares
d)
Micrographs
28.
Developed the final model of DNA.
a)
Hershey and Chase
b)
Watson and Crick
c)
Avery
d)
The Wright Brothers
29.
Alleles of different genes tend to be inherited together from one generation to the next when those genes are located on the same chromosome.
a)
True
b)
False
30.
If two genes are on the same chromosome but usually assort independently, what does this tell you about how close together they are?
a)
They are very close to each other.
b)
They are far apart from each other.
c)
They are part of a polygenic trait.
d)
I have no idea!
31.
During meiosis
a)
The chromosome number stays the same.
b)
The chromosome number doubles.
c)
The chromosome number is cut in half.
d)
The chromosome number triples.
32.
During crossing-over in meiosis, genetic information is exchanged on the chromatids.
a)
True
b)
False
33.
Crossing over leads to genetic diversity.
a)
True
b)
False
34.
A sex-linked gene is
a)
Found on the gametes
b)
Determines gender
c)
found on all chromosomes
d)
only found on autosomes.
35.
_ are used to cut DNA.
a)
Scissors
b)
Restriction Enzymes
c)
Plasmids
d)
Gel Electrophoresis
36.
In DNA, _ pairs with thymine and _ pairs with cytosine.
a)
Guanine, Uracil
b)
Guanine, Adenine
c)
Adenine, Uracil
d)
Adenine, Guanine
37.
In RNA, Uracil pairs with
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
38.
In eukaryotes, nearly all the DNA is found in the
a)
nucleus
b)
cytoplasm
c)
ribosomes
d)
mitochondria
39.
During replication, which sequence of nucleotides would bond with the DNA sequence TATGA?
a)
TATGA
b)
CACTA
c)
ATACT
d)
AGTAT
40.
In _, segments of DNA serve as templates to produce complementary RNA molecules.
a)
Replication
b)
Translation
c)
Gene expression
d)
Transcription
41.
In the genetic code, each codon (group of 3 nucleotides) corresponds to a single amino acid.
a)
True
b)
False
42.
Ribosomes use the sequence of codons in mRNA to assemble amino acids into polypeptide chains.
a)
True
b)
False
43.
_ is the way in which DNA, RNA and proteins are involved in putting genetic information into action in living cells.
a)
Transcription
b)
Translation
c)
Gene expression
d)
Replicatoin
44.
Alleles for the same trait are separated from each other during the process of
a)
mitosis
b)
meiosis
c)
replication
d)
cytokinesis
45.
Which of the following is NOT one of Gregor Mendel's principles?
a)
The alleles for different genes usually segregate independently.
b)
Some forms of a gene may be dominant.
c)
The inheritance of characteristics is determented by factors (genes).
d)
Crossing-over occurs during meiosis.
46.
A situation in which a gene has more than two alleles is known as
a)
complete dominance
b)
codominance
c)
polygenic dominance
d)
multiple alleles
47.
Organisms that have two identical alleles for a particular trait are said to be
a)
hybrid
b)
heterozygous
c)
homozygous
d)
dominant
48.
The physical characteristics of an organism are called its
a)
genotype
b)
genetics
c)
heredity
d)
phenotype
49.
Method used to separate DNA.
a)
Restriction enzymes
b)
Gel Electrophoresis
c)
Splicing
d)
Polymerase Chain Reaction
50.
A _ is a member of a population of genetically identical cells produced from a single cell.
a)
transgenic
b)
clone
c)
mutagen
d)
heterozygote
51.
_ is a process of changing a gene to treat a medical disease or disorder.
a)
Gene regulation
b)
Differentiation
c)
Gene Therapy
d)
Genetic testing
52.
Genetically engineered crop plants can benefit farmers by
a)
reducing the amount of land that is required to grow them.
b)
introducing chemicals into the environment.
c)
increasing an animal's resistance to antibiotics.
d)
changing the genomes of other crops.
53.
Which of the following characteristics is often genetically engineered into crop plants?
a)
Improved flavor
b)
Resistance to herbicides
c)
shorter ripening times
d)
thicker stems
54.
Taking advantage of naturally occurring variations in organisms to pass anted traits on to future generations is called
a)
selective breeding
b)
inbreeding
c)
hybridization
d)
cloning
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