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FS2 - Hair and Fiber

hair and fiber review

Where is mDNA found? In the mitochondria
Which parent can be traced using mDNA? only the mom
How many genes are found in mDNA? 37 genes
Where is nuclear DNA located? In the nucleus of a cell
How many chromosomes are found in normal human nuclear DNA? 23 pairs or 46 total chromosomes
What is a hair shaft? The entire piece of hair, root, shaft, and tip
What is a hair follicle? A cup shaped part of the skin where the hair grows
List the 4 functions of hair regulate body temperature, protection from sun, reduce friction, sense organ
How much does an average human hair grow in 1 month? 1.3 centimeters
What is the medullary index for an animal? more than .5
What is the medullary index for an human? less than .33
What is direct transfer of hairs or fibers? When an object is exchanged directly from the source
What is secondary transfer of hairs or fibers? When object passes between at least 2 sources.
How is fur different from hair? Hair is just primarily the shaft and tip. Fur contains the skin and the hair.
What part of the plant produces cotton fibers? the seed
What part of the plant produces coconut fibers? the fruit
What part of the plant produces flax fibers? the stem
What part of the plant produces manila fibers? the leaves
What part of the plant produces jute fibers? the stem
What part of the plant produces sisal fibers? the leaves
What part of the plant produces hemp fibers? the stem
What type of plant produces coir? coconut
What type of plant produces linen? flax
What type of plant produces sisal? cactus
Created by: lb goodlock



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