Medullary Index
This is the maximum medullary index for human hair.
What is 0.33 microns?
This is the outside layer of the hair shaft.
What is the cuticle?
This is the second stage of the life cycle of hair.
What is the catagen phase?
This is the cuticle pattern of a typical cat.
What is spinous?
A hair has been identified as having an imbricate scale pattern. This is the species you are already hypothesizing that it may belong to.
What is human?
This is the medullary index of a hair with the width of the cortex equal to 26 microns and the width of the medulla equal to 7 microns rounded to the nearest hundredth.
What is 0.27 microns?
This is the protein all hair is composed of.
What is keratin?
About 10-18% of all hairs are in this stage at any given time.
What is the telogen phase?
This medulla type is often found in dogs.
What is vacuolated?
A hair has an intermittent vacuolated medulla, is dark in appearance, is 3-6 inches long, has a right angle distal end and a spade-shaped root. This is the species it most likely belongs to.
What is a dog?
This is the medullary index of a hair with a diameter of 16 microns and the width of the medulla equal to 3 microns rounded to the nearest hundredth.
What is 0.19 microns?
These are the two parts of the hair shaft where pigment is found.
What is the cortex and the medulla?
This stage is usually the best for forensic evidence.
What is the anagen phase?
This pattern looks like a stack of crowns.
What is the coronal cuticle pattern?
This 5cm hair has a continuous, multiserial medulla with a tapered tip appearance. Color appears to be gray. It is most likely this species.
What is a rabbit?
This is the medullary index of a hair with a diameter of 31 microns and the width of the medulla equal to 19 microns rounded to the nearest hundredth.
What is 0.61 microns?
This is where only mitochondrial DNA can be found for forensic analysis.
What is the hair shaft?
In this stage, the hair is considered dormant.
What is the telogen phase?
This type of hair can often have a double medulla.
What is beard hair?
This is the most reliable way to classify a hair as human or nonhuman.
What the use of the medullary index?
A hair has a medullary index of 0.57 and a medulla width of 17 microns. This is the diameter of the hair.
What is 30 microns?
This is classified as spade-shaped in dogs usually.
What is the root?
This is how long the anagen phase lasts in days.
What is approximately 1,000 days?
My last hair cut was 9 months ago. This is how much my hair has grown since going to the barber in centimeters.
What is approximately 11.7 cm?
These two DNA tests use nuclear DNA for their analyses.
What is Y chromosomal DNA (Y-DNA) testing and autosomal DNA (atDNA) testing?