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Gay gene essay in 2021
Gay gene essay 02
Gay gene essay 03
Gay gene essay 04
Gay gene essay 05
Gay gene essay 06
Gay gene essay 07
Gay gene essay 08
What percentage of gay brothers were found to have the same genetic material?
The findings show that identical stretches of DNA on three chromosomes were shared by about 60% of gay brothers in the study compared to the about 50% normally expected by chance. A heated debate over the existence of a "gay gene" emerged from a 1993 report published in the journal Science by then-NIH researcher Dean Hamer, PhD.
When was a heated debate over the existence of a "gay gene" created?
A heated debate over the existence of a "gay gene" emerged from a 1993 report published in the journal Science by then-NIH researcher Dean Hamer, PhD. That study linked DNA markers on the X chromosome to male sexual orientation.
How much of the variability in sexual orientation is due to genes?
Previous studies in male twins have suggested that between 40%-60% of the variability in sexual orientation is due to genes. The rest is thought to be due to environment and possibly other biologic but nongenetic causes. In the study, researchers analyzed the genetic makeup of 456 men from 146 families with two or more gay brothers.
Is there such a thing as a gay gene?
"Since sexual orientation is such a complex trait, we're never going to find any one gene that determines whether someone is gay or not," says Mustanski. "It's going to be a combination of various genes acting together as well as possibly interacting with environmental influences."
Last Update: Oct 2021