Their mother, Florence Addo-Gerth, 35, from Ghana, has dark skin, and the father, Stephan Gerth, 40, from Potsdam in Germany, is white.
Ryan, who came first, weighing 2.650 kgs, has light colored skin, blue eyes, and dark hair. His brother Leo, weighing 2.606 kgs, looks like his mother, with dark skin and dark eyes. Ryan has been described by his mother as 'noisy,' while Leo is a lot calmer.
Doctors say it is an extremely rare occurrence, but it is possible if genes combine in a certain way.
"Ryan came first, and everything was as usual," said the hospital's doctor Birgit Weber.
"But when Leo was born, I couldn't believe my eyes."
The doctor said she had been present at some 10,000 births over almost 20 years and had never seen anything quite like this, it has been reported.
"Both kids have definitely the same father," she added.
The twins were delivered by Caesarean section in a Berlin hospital on July 11, but were kept from the public for six days.
The probability of different colored twins being born even to a mixed-race couple is extremely rare.
Last Mod: 19 Temmuz 2008, 18:48