According to Gallup, 47 percent of Americans chose "nature" over "nurture" when asked about same-sex orientation, while 33 percent say they believe being gay is a product of an individual's upbringing and environment.
As recently as 2011, public opinion on the causes of sexual orientation were about equally split.
This latest poll data appears to follow a larger trend of rising acceptance of LGBT individuals. Earlier this week, Gallup released data showing an increase in support for same-sex marriage, with 53 percent of Americans now in favor.
In the long-term view, support for gay marriage has nearly doubled since the Defense of Marriage Act was passed in 1996 to restrict the federal definition of marriage to opposite-sex couples.
So what do you think? Do these numbers surprise you?