Why do humans have fingerprints? What is the evolutionary theory?

Answer 1

Fingerprints:
A human fingerprint is an impression pattern left on any hard smooth surface by the ridged dermis (skin) (called friction ridges) of the fingertip.[1] Fingerprints are commonly held to be an infallible method of uniquely identifying an individual, but it's more an art than science: most state and federal level crime labs will not report a fingerprint match until two experts independently reach that conclusion.[2]

The fundamentals of fingerprint identification are permanence and individuality. In theory, significant fingerprint characteristics are determined by environment in the 3rd and 4th lunar months of gestation, and do not change.[2] In practice, scars and warts can modify fingerprints somewhat.[2] Popularly, no two individuals, including identical twins, are thought to have the same fingerprints.[2] In 1892, Sir Francis Galton found that the typical fingerprint has 35-50 identification points ("minutiae") and the odds of two being alike is 1 in 64 billion. With a 2006 world population[3] of 6.5 billion individuals (and thus 65 billion fingertips), it would be impossible for all of them to be different.[4] In practice, however, identifications are commonly made from as 8 to 12 minutiae.[5] Using only a fifth of the minutae would reduce the potential number of different fingerprints.

Ordinary fingerprints made of sweat, sebum, dirt, and skin contaminants are called latent fingerprints, to distinguish them from the comparison imprints deliberately taken with inked fingers on "fingerprint cards".[6]

The fingertips are not the only part of the human body with friction ridges. It's also found on the entire dorsal length of the fingers, the palm, and the corresponding skin of the toes and foot[7] and it has been used for forensic identification as well.[8]



Evolutionary theory:
In biology, evolution is the change in the heritable traits of a population over successive generations, as determined by shifts in the allele frequencies of genes. Through the course of time, this process results in the origin of new species from existing ones (speciation). All contemporary organisms are related to each other through common descent, the products of cumulative evolutionary changes over billions of years. Evolution is the source of the vast diversity of extant and extinct life on Earth.[1][2]

The basic mechanisms that produce evolutionary change are natural selection (which includes ecological, sexual, and kin selection) and genetic drift; these two mechanisms act on the genetic variation created by mutation, genetic recombination and gene flow. Natural selection is the process by which individual organisms with favorable traits are more likely to survive and reproduce. If those traits are heritable, they are passed to succeeding generations, with the result that beneficial heritable traits become more common in the next generation.[3][4][5] Given enough time, this passive process can result in varied adaptations to changing environmental conditions.[6]

The modern understanding of evolution is based on the theory of natural selection, which was first set out in a joint 1858 paper by Charles Darwin and Alfred Russel Wallace and popularized in Darwin's 1859 book The Origin of Species. In the 1930s, Darwinian natural selection was combined with the theory of Mendelian heredity to form the modern evolutionary synthesis, also known as "Neo-Darwinism". The modern synthesis describes evolution as a change in the allele frequency within a population from one generation to the next.[6]

The theory of evolution has become the central organizing principle of modern biology, relating directly to topics such as the origin of antibiotic resistance in bacteria, eusociality in insects, and the staggering biodiversity of the living world. The modern evolutionary synthesis is broadly received as scientific consensus and has replaced earlier explanations for the origin of species, including Lamarckism, and is currently the most powerful theory explaining biology.

Because of its potential implications for the origins of humankind, evolutionary theory has been at the center of many social and religious controversies since its inception.

Answer 2

Fingerprints are formed for the period of fetal progression. while the hand is forming, the areas which will exchange into the finger (the volar pads) are initially gentle. They quickly amplify to allow room for blood vessels to boost, and then they're reabsorbed back into the hand. via fact the volar pads are shrinking whilst the hand they're related to is starting to be, the reabsorption isn't gentle, forsaking a chain of ridges and gaps interior the technique. via fact those ridges and gaps are greater-or-much less random, the possibility of any 2 human beings sharing the genuine comparable fingerprints is *fairly* low, albeit not impossible. Fingerprints are genuinely a kind of scar that we are born with, the end results of our bodies bobbing up in a reasonably blind way, with the volar pads and the hand not with the flexibility to coordinate their boost and absorption. This sounds greater like that is ruled completely by risk than that there is an sensible fashion designer carefully monitoring the technique. the reality that persons got here across a use for this ingredient of randomness in our progression does not tutor that something supernatural ought to exist.

Answer 3

Fingure prints are a Unique Biological features of Humans, even our
retinas have different types of prints.
Evolutionary theory states that humans have evolved from monkeys
Assumptions:-
99% of Human and Chimpanzee genetic material matches
Similar bone structure and biological structure
Human jaw lines and Premolar teeths have reduced by 1.5 times in 40000 years which shows that there was evolution of our jaws after many years of our nonn eating of Thick roots in the forests.
There are many more Scientific assumptions mine our a little simple and Illiterate.

Answer 4

Fingerprints increase the area of the skin on our fingers.

More area, more grip.

Furthermore, the ridges also improve grip by latching on to small spaces in the thing we are holding. Just like the grooves in a tire tread.

And yes, monkeys, apes, and other primates hve them too. Furthermore, dogs, cat, bears, etc. have paw prints.

Answer 5

1

Answer 6

I might be way off here but I remember reading somewhere that it's to do with how your hand forms in the womb, the tiny differences are exarggerated as you grow. Nothing really to do with evolution.

Answer 7

Fingerprints are for grip.

Answer 8

ya have finger prints so when ya rob sum 1's house they can find out who did it lol

Answer 9

I wonder if mokeys have finger prints.

Answer 10

So the cops can identify you!