WorksheetsForensics DNA Profiling Review
Total questions: 25
Worksheet time: 13mins
Because DNA is composed of alternating sugar and phosphate molecules, DNA is known as a double helix.
True
False
Most females have one X and one Y (XY) sex chromosome.
True
False
To calculate the percentage of people who have a particular allele, population studies are conducted to collect data.
True
False
Humans share common ancestors. Therefore the DNA STR profile of all humans is the same.
True
False
mtDNA is used to trace ancestry through the female line.
True
False
Except for identical twins, no two people on earth have the same:
physical characteristics.
DNA.
skeletal type.
blood group.
People are always shedding cells. Therefore DNA can be recovered from:
saliva
skin cells
semen
all of these
The term that describes a picture of homologous pairs of human chromosomes is:
karyotype.
genetics.
archetype.
All of these choices.
The 95 percent of noncoding DNA is involved in:
blueprint production.
genetic material.
cell regulation.
DNA fingerprinting.
If one person has two alleles that are the same for a specific STR, then that person is considered to have:
rare occurring alleles.
heterozygous genotypes.
homozygous genotypes.
frequently occurring alleles.
James Watson and Francis Crick received the 1953 Nobel Prize for their work on describing the structure of DNA as:
a double helix that resembles a twisted ladder.
a helix that resembles a twisted ladder.
a triple helix that resembles a twisted ladder.
None of these choices.
Which chromosomes have the same shape and contain the same genes?
genes.
autosomes.
(XX).
introns.
DNA in chromosomes is called
DNA.
DNA chromosomes.
nuclear DNA.
structural DNA.
Alternate forms of a gene are called:
chromosomes
DNA.
RNA.
alleles.
(GAAT) (GAAT) (GAAT) (GAAT) is an example of:
restriction fragments.
PCR.
DNA fingerprinting.
STR.
The total amount of DNA in a cell, which is contained in the cell's nucleus (nuclear DNA) and mitochondria (mtDNA), is called the human:
RNA.
gene.
allele.
genome.
Approximately how many base pairs are in the human body?
6 thousand base pairs.
6 trillion base pairs.
6 million base pairs.
6 billion base pairs.
Dr. Alec Jeffreys at the University of Leicaster observed that DNA from different individuals contains different polymorphisms. His laboratory developed a technique for isolating and analyzing these variable areas that is known as:
DNA quantifying, or DNA profiling.
DNA sorting, or DNA profiling.
DNA investigating, or DNA profiling.
DNA fingerprinting, or DNA profiling.
Which method is used to identify different STR markers?
x-raying DNA samples
calculating the allele frequency
extracting the mtDNA from the gene
adding fluorescent dyes to the PCR reaction
Ninety-five percent of DNA is non-coding. What term describes non-coding DNA that acts as genetic "on-an-off" switches?
base pairs
exons
introns
karotypes
What material is used to isolate and cut DNA?
restriction enzymes
nitrogenous bases
polymerase chain reaction (PCR)
electrophoresis
short tandem repeat (STR)
Name a method of separating molecules, such as DNA, based on their size.
restriction enzymes
nitrogenous bases
polymerase chain reaction (PCR)
electrophoresis
short tandem repeat (STR)
The DNA of every organism on earth is made of the same four
restriction enzymes.
nitrogenous bases.
polymerase chain reaction (PCR).
electrophoresis.
short tandem repeat (STR).
Amplifying trace samples of DNA is called
restriction enzymes.
nitrogenous bases.
polymerase chain reaction (PCR).
electrophoresis.
short tandem repeat (STR).
__________ are variable regions of DNA that repeat.
Restriction enzymes
Nitrogenous bases
Polymerase chain reaction (PCR)
Electrophoresis
Short tandem repeat (STR)
