I want to know the answer to the following question:
What thing that strongly differentiates the French from some other populations be clinal across Europe?
All the background I'm provided with is that "(2009) found "a selected allele that strongly differentiates the French from both the Yoruba and Han could be strongly clinal across Europe, or at high frequency in Europe and absent elsewhere, or follow any other distribution according to the geographic nature of the selective pressure.". Is that enough to answer the question?
Answer: yes