Hair Analysis

Which of the following are functions of hair?

• regulate body temperature

• decrease friction

• protects skin from sunlight

• sense organ

What type of organisms are the only ones that possess hair

• reptiles

• birds

• amphibians

• mammals

Which part of a strand of hair contains nuclear DNA, and therefore can narrow down identity to a single person?

• follicle

• shaft

Which part of a hair strand has mitochondrial DNA, and therefore can only narrow identity to specific a group of people?

• follicle

• shaft

Tags

NGSS.HS-LS3-2

What is the central core of a hair called?

• medulla

• cuticle

• cortex

What is the largest part of the hair shaft that contains melanin granules called?

• medulla

• cuticle

• cortex

What is the transparent outer layer of the hair that is made up of scales called?

• medulla

• cuticle

• cortex

Which medulla pattern is one unbroken line of color?

• continuous

• fragmented

• interrupted

• solid

• none

Which medulla pattern is a pigmented line broken at regular intervals?

• continuous

• fragmented

• interrupted

• solid

• none

Which medulla pattern is a pigmented line unevenly spaced?

• continuous

• fragmented

• interrupted

• solid

• none