Download Chapter12_HW_DNA

Name: _________________________
Forensic Science
Chapter 12 Homework (DNA)
I. Vocabulary: Define (in your own words) and draw diagrams illustrating the following
forensic terms. You may use your textbook, the internet or other resources.
Vocabulary
Word
Deoxyribonucleic
acid
Chromosomes
Genes
Helix
Restriction
Enzymes
Electrophoresis
Polymerase
Chain Reaction
(PCR)
CODIS
Definition
(in your own words)
Drawing
(illustrate the vocabulary word)
II. Questions:
1. What is DNA fingerprinting and what is it used for? (p. 336 and P. 341)
2. What is the relationship between chromosomes, DNA, nucleotide, genes, and proteins? (p. 336337)
3. Draw and label a diagram of DNA. Label: sugar, phosphate, nitrogenous base, nucleotide, A,
C, T, G. (Power Point)
4. The following is one strand of the DNA helix. Label the other strand with the correct base pair.
_________________________________________
A C G A T C C G T A A G C A T
| | | | | | | | | | | | | | |
__________________________________________
5. True/False: write the word true or false next to each statement (see pages 336-339)
a. __________ Human cells have 23 chromosomes.
b. __________ DNA is made of a triple helix.
c. __________ DNA cannot be found in red blood cells.
d. __________ A chromosome is part of a gene.
e. __________ The human genome consists of about 1,000 genes
f. __________ If a person inherits the same allele for a particular trait from both parents,
then it is called homozygous.
g. __________ Recessive alleles are expressed over dominant alleles.
h. __________ More than 99% of every human being’s DNA is identical.
i. __________ If all the DNA in the human body were put end to end, it would reach to
the sun and back more than 600 times.
j. __________ Fraternal twins share 100% of their DNA.
6. Explain the four main procedures involved in DNA fingerprinting. (p. 345)
a. Isolation:
b. Cutting:
c. Sorting:
d. Analyzing:
7. Explain how electrophoresis works (p. 348-349).
8. What is the difference between mitochondrial and nuclear DNA? What are some advantages of
using mtDNA to solve crimes? (p. 361)
9. Read the Case Study “The Green River Killer Case” on page 363. How was DNA used to
solve the cold case?
10. Under the Resources tab in the eTextbook, click on Forensics in Action and then “947 years”.
a. What is the Innocence Project?
b. What was Marvin Anderson convicted of?
c. Why was his conviction eventually overturned?