Yes, the following article backs this theory.
www.scientificamerican.com
The word gene is often used when gene allele would be more appropriate. A gene is a location on a chromosome which may contain one of several alleles. For example, the gene for eye color may have an allele for light brown, dark brown, blue, green, or grey eyes.
Many different alleles determine intelligence.
Tay-Sachs and Gaucher's are determined by a gene allele that is dominant for higher intelligence and recessive for the diseases. If a person has both genes for one of these, the person has the disease and more intelligence. If the person has one gene for one of these the person does not have the disease, but does have more intelligence.
The superior average intelligence of the Ashkenazim is a comparatively recent development. Ashkenazi Jews had to evolve more intelligence quickly, so they picked up some dangerous intelligence alleles.
The great majority of human evolution took place in Africa. Nevertheless, agriculture, civilization, and cold climates select more vigorously for intelligence than Africa, so races that evolved further outside of Africa have higher IQ averages than Negroes.
Ancient Egyptians were Caucasians. Their ancestors evolved in Asia and crossed the Sinai Peninsula after they developed agriculture, but before they developed civilization.
Today Egyptians have higher IQ averages than Negroes, but lower averages than Europeans, who developed civilization later, but who evolved in colder climates.