Deck 7: Dna Profiling

Question 1

James Watson and Francis Crick received the 1953 Nobel Prize for their work on describing the structure of DNA as:

A)a double helix that resembles a twisted ladder.
B)a helix that resembles a twisted ladder.
C)a triple helix that resembles a twisted ladder.
D)None of these choices.

Answer 1

A

Question 2

Humans share common ancestors.Therefore the DNA STR profile of all humans is the same.

Answer 2

False

Question 3

Because DNA is composed of alternating sugar and phosphate molecules, DNA is known as a double helix.

Answer 3

True

Question 4

mtDNA is used to trace ancestry through the female line.

Question 5

(GAAT) (GAAT) (GAAT) (GAAT) is an example of:

A)restriction fragments.
B)DNA fingerprinting.
C)PCR.
D)STR.

Question 6

Most females have one X and one Y (XY) sex chromosome.

Question 7

Name a method of separating molecules, such as DNA, based on their size.___________________________________.

Question 8

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:

A)genome.
B)gene.
C)allele.
D)RNA.

Question 9

Alternate forms of a gene are called:

A)chromosomes.
B)DNA.
C)alleles.
D)RNA.

Question 10

Ninety-five percent of DNA is non-coding.What term describes non-coding DNA that acts as genetic "on-an-off" switches?

A)karotypes
B)exons
C)introns
D)base pairs

Question 11

Which method is used to identify different STR markers?

A)x-raying DNA samples
B)extracting the mtDNA from the gene
C)adding fluorescent dyes to the PCR reaction
D)calculating the allele frequency

Question 12

What material is used to isolate and cut DNA?____________________________________________.

Question 13

The 95 percent of noncoding DNA is involved in:

A)blueprint production.
B)genetic material.
C)cell regulation.
D)DNA fingerprinting.

Question 14

In 1984, 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:

A)DNA quantifying, or DNA profiling.
B)DNA fingerprinting, or DNA profiling.
C)DNA sorting, or DNA profiling.
D)DNA investigating, or DNA profiling.

Question 15

To calculate the percentage of people who have a particular allele, population studies are conducted to collect data.

Question 16

Except for identical twins, no two people on earth have the same:

A)physical characteristics.
B)DNA.
C)blood group.
D)skeletal type.

Question 17

Approximately how many base pairs are in the human body?

A)6 million base pairs.
B)6 billion base pairs.
C)6 thousand base pairs
D)6 trillion base pairs.

Question 18

Which chromosomes have the same shape and contain the same genes?

A)genes
B)autosomes
C)(XX)
D)introns

Question 19

DNA in chromosomes is called

A)DNA.
B)DNA chromosomes.
C)nuclear DNA.
D)structural DNA.

Question 20

If one person has two alleles that are the same for a specific STR, then that person is considered to have:

A)rare occurring alleles.
B)heterozygous genotypes.
C)frequently occurring alleles.
D)homozygous genotypes.

Question 21

__________________________ are variable regions of DNA that repeat.

Question 22

Amplifying trace samples of DNA is called ____________________________.

Question 23

The DNA of every organism on earth is made of the same four _______________________________.