Hair and Fiber Evidence

The part of hair that can have DNA is:

• the hair root

• the hair shaft

• the hair tip

• the hair cuticle

Tags

NGSS.MS-LS3-1

When you view a hair sample under a microscope, the three main components you will see are (a)   .

The three different stages hair can be in are:

• Anagen, Catagen, Telogen

• Growth, Rest, Fall

• Active, Dormant, Shedding

• Initial, Middle, Final

The amount of fiber transferred from its source depends upon which five factors?

• Type of fiber, length of fiber, method of transfer, condition of fiber, and force of contact

• Color of fiber, age of fiber, humidity, temperature, and light exposure

• Source material, storage time, chemical treatment, air quality, and fiber thickness

• Weave pattern, dye used, washing frequency, sunlight exposure, and fiber elasticity

Unique fibers are defined as:

• Fibers that have distinct characteristics not found in other fibers

• Fibers that are always synthetic

• Fibers that are only used in clothing

• Fibers that are always natural

Three characteristics of fibers that can be determined under a microscope are:

• Color, diameter, and cross-sectional shape

• Length, weight, and melting point

• Elasticity, tensile strength, and density

• Absorbency, flammability, and solubility

Label the parts of a hair shaft

a

b

c

cortex

medulla

cuticle

Which scale pattern is indicated?

• Coronal
• Spinous
• Imbricate
• None of these