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Why do we have fingerprint and why it is unique

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No match

If two faces can be exactly similar, why two fingerprint can’t

be similar

Our fingerprint started to develop at the age of around 10

weeks

You get your own fingerprint around 4 month

age

Middle layer of skin, Basal layer grows faster during this time

Basal layer strains against its neighbor for

space as it grows faster. Pressure causes skin to

fold

epidermis

Basal layer

Dermis

These folds are random

Folds in skin

First faint line appear on skin because of folding of skin

Fetus touches its surroundings

and those simple touches

also help to create

fingerprint patterns

Random pattern of folds on skin changes with every

touch

Difference in activity of fetus, condition inside the womb causes

the difference in fingerprint

No match

Even twins in same womb don’t do same activities, neither their skin folds in same pattern

Fingerprints don’t change

with age

Because this folds go deep into dermis

No proper fingerprint because of rare genetic condition

•Adermatoglyphia

•Dermatopathia pigmentosa reticularis