![]() ![]() For context, between 25 and 40 percent of people fall in that range normally, they say. The average for the seven traits that inbreeding negatively impacted in the study was between 0.3 and 0.7 standard deviations below the mean. The researchers found that inbreeding in humans causes physical and mental problems, though the severity of those effects was somewhat limited. The inbred children are also at higher risk of rare recessive genetic disorders, though the researchers didn’t include any data on those. Inbred children commonly displayed decreased cognitive abilities and muscular function, reduced height and lung function, and are at greater risk from diseases in general, they found. The team determined that 125 people, or 1 in roughly every 3,600, met their criteria for inbreeding, meaning the parents were likely either first-degree relatives (siblings, for example), or second-degree relatives (aunts or uncles, among other possibilities).Īmong those people whose parents were related, the researchers picked out typical signs of human inbreeding, such as a few common health issues. We all have homozygous genes, but finding many of them in a row is a hallmark of inbreeding. They were looking for long runs of homozygosity, or identical versions of a gene, in the participants’ DNA, a sign that their parents may have been related. ![]() Scientists from the University of Queensland, in Australia, sifted through some 450,000 genomes from people of European ancestry born between 19. ![]() Read more: DNA Ancestry Tests Can Expose Family Secrets Following up with a look at their genomes, the researchers pinpointed a number of health issues that will likely result from their parentage. 03 percent, appear to have parents who were either first- or second-degree relatives, the researchers say. Now, researchers using data from the UK Biobank, a genetic database of around half a million people from the country, have scanned for evidence of inbreeding in the participants. ![]()
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