Exam 11: Hairs and Fibers

It is not necessary for questioned and standard/reference hairs to come from the same area of the body.

Beard hairs are coarse and normally ________ in cross-section.

In comparing hairs, what aspects of the hair is the criminalist particularly interested in matching? Name at least one other important feature that the criminalist might compare.

The cortex of hair derives its major forensic importance from the fact that it contains:

The three basic cuticle patterns are coronal, spinous, and ________.

Describe three analytical techniques for comparing the color of two fibers.

Mohair and cashmere are hairs from:

A fiber whose microscopic appearance includes being ribbon-like in shape (flat)with twists at irregular intervals is:

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Fibers derived from either natural or synthetic polymers B)A transition stage between the anagen and telogen phases of hair growth C)Two or more atoms held together by chemical bonds D)A cellular column running through the center of the hair E)DNA that is present in the nucleus of a cell and that is inherited from both parents F)The scale structure covering the exterior of the hair G)The final growth phase in which hair naturally falls out of the skin H)DNA present in small structures outside the nucleus of a cell.. This form of DNA is inherited maternally (from the mother). I)A substance composed of a large number of atoms that are usually arranged in repeating units J)The main body of the hair shaft K)Fibers derived entirely from animal or plant sources L)The basic unit of structure from which a polymer is constructed M)A molecule with a high molecular mass N)The initial growth phase during which the hair follicle actively produces hair O)A translucent piece of tissue surrounding the hair's shaft near the root that contains the richest source of DNA associated with hair -Cuticle

Which type of crime is LEAST likely to be solved with the use of fiber evidence?

Which feature of hair is MOST important in making a species identification?

What physical properties are used most often to characterize glass particles? What is the main drawback of using these properties to characterize glass?

A cast of a hair surface can be made using:

Nuclear DNA typing can be most successfully accomplished on hairs that have been removed during which stage of growth?

The three phases of hair growth are the anagen, catagen, and ________ phases.

The central canal running through many hairs is known as the:

Forcibly removed hairs often bear follicular tags that are rich sources of ________ DNA.

Rayon is classified as a:

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Fibers derived from either natural or synthetic polymers B)A transition stage between the anagen and telogen phases of hair growth C)Two or more atoms held together by chemical bonds D)A cellular column running through the center of the hair E)DNA that is present in the nucleus of a cell and that is inherited from both parents F)The scale structure covering the exterior of the hair G)The final growth phase in which hair naturally falls out of the skin H)DNA present in small structures outside the nucleus of a cell.. This form of DNA is inherited maternally (from the mother). I)A substance composed of a large number of atoms that are usually arranged in repeating units J)The main body of the hair shaft K)Fibers derived entirely from animal or plant sources L)The basic unit of structure from which a polymer is constructed M)A molecule with a high molecular mass N)The initial growth phase during which the hair follicle actively produces hair O)A translucent piece of tissue surrounding the hair's shaft near the root that contains the richest source of DNA associated with hair -Mitochondrial DNA

Which is made of natural polymers?