How are the white and black lackses related? who are their common ancestors?

Both the white and black Lacks are all blood related as they have the same family tree. Their common ancestors were: Albert Lacks(Father), Arbert Lacks(Son), Winston Lacks, and Benjamin Lacks. Albert Lacks was a the owner of a plantation. He was a white man who was Henrietta Lack's (a black woman) great-great grandfather. 

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the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.