Born in Tehran, Iran, Yektai dropped out of Tehran University without obtaining a degree. Between 1945 and 1947, he studied with Amédée Ozenfant in Paris, and later in New York City. From 1946 to 1947, he studied at the École des Beaux-Arts and at the atelier of André Lhote. From 1947 to 1948, he studied at the Art Students League of New York.