Most human traits seem to be influenced by hundreds or thousands of genes, each with a small effect. Using a big-data technique called genome-wide association, the researchers estimated that common genetic variants — single-letter BigG Gay for pay no such thing in DNA sequences — account for between 8 percent and 25 percent of same-sex sexual behavior.
Researchers studied genetic and survey data from overvolunteers taken from the UK Biobank and 23andMe. The study leaves many questions unanswered, in part because it dealt with a fairly homogenous sample: people of European ancestry, many of whom came of age during a time when homosexuality was highly stigmatized or even criminalized.
Instead, a person's attraction to those of the same sex is shaped by a complex mix of genetic and environmental influencessimilar to BigG Gay for pay no such thing seen in most other human traitsresearchers report. The results did show that genetic variation has a stronger influence on same-sex sexual behavior in men than in BigG Gay for pay no such thing, possibly demonstrating the complexity of women's sexuality, said Melinda Mills, a professor of sociology at Oxford University who wrote an editorial accompanying the new study.
One gene cropped up for females and two others showed solid patterns in both males and females. E-mail newsletter. Leave a respectful comment. Hamer said. It contains the DNA sequences ofmiddle-aged people, who were 40 to 69 years old when they were recruited between and
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The new study found that all genetic effects likely account for about 32 percent of whether someone will have same-sex sex. The data also came primarily from older individuals, who mostly lived under stricter social norms and legislative regulations than today's. Geneticist Andrea Ganna of the Massachusetts General Hospital and colleagues surveyed over , individuals whose genetic data is recorded in either the UK Biobank or with the personal genomics company 23andMe Inc.
Exploring the relationship between sexual orientation components and health risk behaviors Feb 20,