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Chapter 7 section #3

Last updated over 4 years ago

12 questions

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Question 1

1.

Collection and preservation of DNA

Avoid touching your face, nose, and mouth when collecting and packaging evidence
Avoid touching the area where you believe DNA may exist
Wear disposable gloves and change them often
If wet evidence cannot be dried, it may be frozen
Keep evidence cool and dry during transportation and storage
Air-dry evidence thoroughly before packaging
Use disposable instruments for handling each sample
Avoid talking, sneezing, and coughing over evidence
Put evidence into new paper bags or envelopes

Question 2

2.

DNA is mixed with special ______________

Question 3

3.

DNA is separated within an ___________ gel

Question 4

4.

___________________ of DNA evidence can occur when DNA from another source is mixed with DNA that is relevant to the case.

Question 5

5.

DNA ____________________ differ from person to person.

Question 6

6.

______________________ can damage DNA evidence, because it encourages mold growth, which can damage the DNA material.

Question 7

7.

During electrophoresis, the DNA fragments which are the _____________ travel the farthest.

Question 8

8.

Cells are isolated from ___________________ such as blood, saliva, urine, semen, and hair.

Question 9

9.

The DNA can be extracted from the cell __________________.

Question 10

10.

DNA samples are placed in gels through which ______________ currents are passed

Question 11

11.

_______________________-a molecule that cuts a DNA molecule at a specific, base sequence

Question 12

12.

What does PCR represent?