Complex sentence: The Basque Region in Northern Spain is genetically distinct holds the least Mediterranean and North African ancestry in the peninsula, its population being typical of Atlantic Europe and likely to be similar to the Iberian peninsula's paleolithic inhabitants who repopulated the Western Europe after the Ice Age.
Split into simpler sentences: The Basque Region in Northern Spain is genetically distinct as well as typically Atlantic European, holding the least Neolithic/Mediterranean and North African ancestry in Iberia. Modern day Basques are likely to be genetically similar to the Iberian peninsula's paleolithic inhabitants who repopulated the Western Europe after the last Ice Age.