The answer to this requires several lines of reasoning.
Regarding genetics: There are 2 main genetic groups of Jews, the Sephardic and the Ashkenazic. The former are basically the same as Arabs; the latter are light-skinned caucasians (Aryans, in truth!). So there can’t be a single genetic strand among even hereditary Jews–not to mention all the Ethiopians and converts.
Regarding storytelling: It’s a basic human trait that, up till the past 50 years, has been how humans have entertained themselves on a nightly basis, and so has been selected for in most human cultures. Today, the less technological media a culture uses; the more storytelling is revered as an art. In the European/American Jewish tradition storytelling is also a part of many religious rites and ceremonies, so the Storyteller is a licensed position in the religious community, and to be one is an honor.
So, the tendency in the European/American Jewish community is to choose a Storyteller over other possible mates–genetic selection, if you will.
And since the rest of the European/American community could care less about the ability to tell stories, then it may be possible to say that over the past 50 years Jewish people have been both culturally and genetically selecting for storytelling while the rest of us have not.