Yes, it's generally believe that all living women descend from a single common woman see https://en.wikipedia.org/wiki/Most_recent_common_ancestor https://en.wi

Yes, it's generally believe that all living women descend from a single common woman see https://en.wikipedia.org/wiki/Most_recent_common_ancestor https://en.wikipedia.org/wiki/Most_recent_common_ancestor and https://en.wikipedia.org/wiki/Mitochondrial_Eve https://en.wikipedia.org/wiki/Mitochondrial_Eve for some discussion on the quantitative analysis.