DMS Forensic Science

Aneoploides result due to problems that occur during __

meiosis

How many pairs of chromosomes do normal people have?

23 pairs of chromosomes

How many total chromosomes do normal people have?

46 total chromosomes

How is a person of interest different from a suspect?

A suspect is a person of primary focus; once a person is a suspect, they are protected by law, including Miranda rights.

What is forensic science and how long has it been in use to solve mysteries?

Around for thousands of years, forensic science is the application of science to technical questions relating to events that may lead to civil litigation or criminal prosecution.

What does hydochloric acid do to limestone?

Creates a chemical reaction and produces a gas.

What kind of evidence is considered conclusive?

DNA and sometimes fingerprints.

What kind of cells is DNA found and why is DNA important to a crime scene?

Every nucleated cell in our body; it is important because it is considered conclusive evidence.

What are the responsibilities of the first person at a crime scene?

First responsibility is the preservation of life, then to control suspects and witnesses: protection of the crime scene.

How should you first focus a microscope?

First use the lowest power focus.

What is aneuploidy?

Genetic disorder that involves the addition or deletion of chromosomes.

What is phenotype and genotype?

Genotype: combination of alleles Phenotype: physical appearance

What kind of evidence is considered presumptive?

Hair, fiber, shoe prints, and sometimes fingerprints.

What is a negative control?

In a controlled experiment one set of samples have been modified and the other set of samples are either expected to show no change (negative control) or expected to show a definite change (positive control). A negative control is an example of what you are NOT looking for in the experiment.

Where are genes contained?

In chromosomes

What is a solute?

It is a dissolved substance.

What is a solvent?

It is a substance capable of dissolving one or more substances.

What are fingerprints?

Patterns created by skin ridges on the fingers and thumbs.

How can a crime scene be contaminated?

People other than the suspect and victim leaving behind physical evidence when they view the crime scene.

How should you avoid contamination of a crime scene?

Restrict area and have visitors sign release forms agreeing to provide fingerprints, hair samples, DNA etc.

What is chromatography?

Separation of chemical mixture into its individual substances.

What is karyotyping?

Technique where chromosomes are visualized under a microscope to look for abnormal number of chromosomes in order to identify an aneoploidy.

What is steganography?

The art of hidden or covered writing.

What is cryptography?

The art of secret writing.

What is a Super Male?

Type of aneuploidy when a male has an extra Y chromosome.