|Ana Verayo |||Feb 08, 2015 04:35 AM EST|
(Photo : Pixabay) A new study reveals that humans are still evolving based on natural selection.
A new study takes into consideration how cultural influences greatly affect the process of natural selection, which remains the driving force of human evolution even if overall birth and death rates are at an all time low compared to any point in human history.
A team of researchers from the Uppsala University in Sweden took into account birth records, marriages and even death records from 10,000 individuals from several churches in Finland beginning from the 18th century, said lead researcher Elisabeth Bolund.
Like Us on Facebook
During the 18th and 19th centuries, the team discovered that four to 18 percent of factors such as lifespan, number of members in the family they belong to and age gaps of the first and last childbirth were largely determined by genetic factors. The rest of the factors were influenced by environmental ones.
Bolund said this finding is exciting news since it shows that if genes can be affected by these traits, it also means people have the ability to change their response to natural selection. An investigation of the genetic basis of these complex traits shows their ability to change via evolution.
The findings also show that the genetic influence when it comes to the timing of reproduction and size of a family are higher in modern times compared to the last few centuries. This suggests that genetic differences still continue to affect modern evolution.
Bolund also said that modern societies have more freedom for individuals to express their genetic predispositions, especially since social influences are more relaxed and leads to more genetic differences and reproductive patterns.
The team also found out that the genetic basis of reproductive traits and longevity did not alter over time. This is good news since this can determine current patterns of natural selection in order to predict the trend of modern human populations over the next few generations.
This is also pivotal in predicting population responses when it comes to epidemics, ageing populations and infertility. This study was published in the journal, Evolution.
©2015 Chinatopix All rights reserved. Do not reproduce without permission
China's former Chief of the Ministry of Public Security, Zhou Yongkang, has been given a life sentence after he was found guilty of abusing his office, bribery and deliberately ... Full Article
China Pork Prices Expected to Stabilize As The Supplies Recover
Elephone P9000 Smartphone is now on Sale on Amazon India
There's a Big Chance Cliffhangers Won't Still Be Resolved When Grey's Anatomy Season 13 Returns
Supreme Court Ruled on Samsung vs Apple Dispute for Patent Infringement
Microsoft Surface Pro 5 Rumors and Release Date: What is the Latest?