A new study shows that parents with twins can look more similar to each other than to their own children when it comes to the things they like to wear.
The research, published in the journal PLOS ONE, shows that twins, like their sisters, can even show greater similarity than siblings do.
Researchers used a genetic test to look for a gene that is more common in twins than in sisters.
They then used the gene to identify the genes that made up the facial features that most closely resembled their twin.
The twins also had the same face shape and age.
The results showed that identical twins are about two-thirds as similar as fraternal twins.
The study, led by Daniel R. DeGusto, professor of psychology and psychology at the University of Arizona, looked at facial features in twins and fraternal twin pairs.
It found that identical and fraternally related twins showed a greater degree of similarity than identical twins, but this was not the case for fraternal or sibling twins.
“What we are trying to say is, the genes are more likely to play a role in how we look,” said DeGUSTo.
The genetic tests were conducted on twins from the University Medical Center Zurich in Switzerland and the University Hospital of Leiden in the Netherlands.
The researchers used a technique called microarray profiling to look at the gene activity in the DNA of the twins.
This was the same technique used to look up the genes of the siblings.
DeRubeo said that it was a little tricky to use microarray testing because each twin had its own DNA, which meant that each individual had its genetic makeup that was different from the other.
De Rubeo and his colleagues analyzed the DNA from twins and found that the genes shared by both groups showed up on the DNA profile of identical twins.
For example, the same DNA was found on identical twins that shared a common gene for an enzyme called methyltransferase.
The scientists looked for these genes in both twins and studied the methyltransferases gene in the twin.
They found that methyltransferased enzymes are present in the same areas of the DNA that were active in identical twins but different from identical twins who shared a gene for this enzyme.
“These two sets of genes are so similar that we could say that identical twin genes have a common origin in the genetic code,” DeRubo said.
The genes that were different from twin twins were located in regions of the gene that are not active in twin twins.
In other words, these genes were different in that their activity was different than that of identical twin twins, and this was also the case with fraternal and sibling twins, he said.
“Our finding that the DNA patterns in identical and sibling groups are almost identical, but the gene structure is different, is really very interesting because we don’t know what those differences are,” DeGurgos said.
De Gusto is working on the genetics of facial features, which are thought to play an important role in facial development and development of the eye and face.
DeCoust and DeGuso are now looking at gene activity within genes associated with facial development.
“We need to find out if there is any overlap between identical twins and their twin siblings,” De Rubo added.