Hair and Fiber

Where is Nuclear DNA found in the hair?

• root

•  hair shaft

• tip

• medulla

Which phase of hair growth is the intermediate period of hair growth and lasts about three weeks?

• anagen

• catagen

• telogen

• melanen

In which phase of hair growth is hair actively growing?

• anagen

• catagen

• telogen

• melanen

The deepest layer of hair (compared to the lead of a pencil) is the ___

• medulla

• cortex

• cuticle

• keratin 

Hair color comes from a pigment called

• Hair dye

• Melanin

• Paint

• Genes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Hair is helpful in solving old crimes because…

• hair on a suspect never changes

• hair always contains DNA evidence

• hair takes little room to store in evidence closets

• hair does not easily decompose

The following medullary pattern is called

• fragmented 

• continuous

• interrupted

The hair shaft is composed of what important protein?

• Cellulose 

• Chitin

• Peptidoglycan

• Keratin

When fibers are transferred straight from suspect to victim or victim to suspect, this is called

• Necessary transfer

• Absolute transfer

• Indirect transfer

• Direct transfer

What cuticle type is in the picture?

• Coronal

• Imbricate

• Spinous