Ugandan President Yoweri Museveni signed into law Monday a bill that criminalizes homosexuality.
Museveni had gone back and forth about the controversial bill.
Last month, Museveni said he wouldn't sign the bill, describing homosexuals as 'sick' people who needed help, not imprisonment.
Then he backtracked this month and said he'd sign it because scientists had determined that there's no gene for homosexuality and it was merely abnormal behavior.
Then, last week, he said he would seek advice from American scientists before he made any decision.
Homosexual acts are illegal in Uganda. The law toughens the penalties, including life imprisonment for certain acts.
Museveni said that Ugandan scientists had determined there was no gene for homosexuality.
'It was learned and could be unlearned,' he said.
Shortly after his announcement, U.S. President Barack Obama warned that enacting the bill would affect relations between the two nations. He described the proposal as an 'affront and a danger to the gay community' in Uganda.
The United States and Britain are among the nation's largest donors.
Placating Western donors
Then, in what appeared to be a move to placate Western donors, Museveni said he would seek extended guidance.
In a statement last week, he said U.S. scientists sent him opinions indicating 'homosexuality could be congenital.'.