Form of human TEETH can reveal the genetic history of the owner and could be used to identify humans in forensic research and track the evolution of our species with fossils
- Researchers observed several traits of teeth and their combinations
- Find links between physical characteristics and genetic links in other studies
- Dentures can be used to understand genetic lines when DNA and other remnants are not available
The unique shape and shape of teeth could make them a useful tool in tracing a person's genetic history.
A study found that some characteristics of dozens of remains – such as crown growth patterns, large cusp, number of roots, and the presence of wisdom teeth – can serve as pieces of a puzzle to help distinguish a person's identity and genetic makeup.
These techniques can then be applied in a variety of ways, to both modern and ancient remains, and it could, for example, help identify unknown individuals in ongoing forensic cases where skeletal or DNA remains have been destroyed.
It could also be used to unravel the mystery of & # 39; the origin of & # 39; to unpick a human race from fossil remains or to explore the prehistoric movement of ancient populations.
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A study found that some characteristics of dental remains – such as crown molding patterns, large cusp, number of roots, and the presence of wisdom teeth – can act as pieces of a puzzle to help distinguish a person's identity and genetic makeup
Teeth grow rings like trees that & # 39; function like a & # 39; married life archive & # 39;
Human teeth act as tree rings and retain intimate details about a person's life, a study has found.
The study by American scientists found a material in teeth called cementum develops a fresh layer every year.
Studying subtle changes in their growth can provide important details such as when an individual was pregnant, seriously ill or in prison.
Cementum is a toxic tissue that encompasses the root of teeth.
It grows a new layer every year.
The microstructure of the cementum is only visible through microscopic examination.
Analysis can reveal the underlying organization of & # 39; fibers and particles that & # 39; t the material of this part of & # 39; forming teeth.
The microscopic layers can be illuminated with a variety of laboratory methods.
Each layer has a slightly different structure to form the body i = the cementum.
When the body is under pressure, the structure is very different than under normal conditions.
How the body is under pressure can also be determined when.
Research from the University of Tübingen published in the journal PNAS used an algorithm to compare DNA data with commonly seen dental properties.
This allows researchers to find links that link genetics and tooth characteristics, gathered by assessing more than 130 million possible combinations.
Teeth are extremely durable and often survive long after other tissues that can be used to identify a person have perished.
So far, it has been difficult to interpret the information they hold, which has been difficult.
& # 39; Dental properties can be used in population genetic studies if DNA is not available, & # 39; says Hannes Rathmann, who did the research.
& # 39; Most human dental traits probably originated by chance as a result of genetic drift.
& # 39; That is an evolutionary process that is considered neutral, with no particular advantages or disadvantages for individuals like the population. & # 39;
The scientists say that researchers should pay attention to the appearance of & # 39; teeth that they don't discover.
This will be of particular use if DNA cannot be retrieved due to poor preservation or if restrictions apply to destructive sampling, such as in paleoanthropological research, says co-author Dr Hugo Reyes-Centeno.
& # 39; We propose that future studies should prioritize the most effective dental traits and traits found in our study, in order to allow them to draw more accurate conclusions about genetic relationships, & # 39; he adds.
A recent study found human teeth act as tree rings and retain intimate details about a person's life. Left, a look at the second molar of a 35-year-old woman who had children at the age of 19 and 24. In the middle is a zoomed-in section of & # 39; a left image. To the right, the cementum, which has two distinct dark & # 39; rings & # 39; presents that do not match the two reproductive events