I only recently started my journey into understanding Y-DNA after realizing we would not determine my father's lineage without the BIG Y-700. This was the first video recommended to me (and by a project admin of one of the groups I enrolled my father) that made everything "click". Certainly, I still have questions, but I have a much clearer understanding of what I'm looking at while we await his results. Thank you so much - incredibly informative.
My surname is Bell, I have one full sibling, a Brother, I did 23 and Me and paid for my Brother to do 23 and Me so we would know our Y- DNA after our Dad died. We are R1b DF13 CTS241, our MtDNA is H5a1. Our Paternal Great Great Grandfather Bell was born in 1841 or 1842 in Clones, County Monaghan, Ireland, but a Great Aunt told me that her Grandmother told her that our Great Great Grandfather had moved from Clones back to Paisley Scotland around age 12 because he still had relatives there and from Paisley he emigrated to Philadelphia in 1859. Brother and I share just under 57% of our DNA. I recently was able to find family names dated back to the early 17th century through my Paternal Great Grandmother's McVey family. Her Mother was à Styer who married a McVey. My Paternal Grandmother was born McLaughlin and her Mother was born Harvey and her Mother was born McClarigan.
I take my Dna 23andme and they told me that my paternal haplogroup is t-l208 but right now I am planning to take big y 700 test to see who is my closest male relatives.
The Big Y includes STRs up to Y-111 and many more commonly unused. However, the Big Y sequencing includes identifying all the readable mutations down the tree of mankind down to the tester. Those mutations are followed down to the 'terminal' haplogroup for the individual. The results now provide the haplogroup's age with a tool called Discover.