What does it mean when there is a".2" in a haplogroup?

Started by Jerry Paul on Sunday, October 11, 2020
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According to the test I took through 23andMe, my haplogroup is R-P278.2. Is that a completely different haplogroup or is it an offshoot of this one?

R-P278.2 is my dad's haplogroup. His father was from Poland.

Where is your paternal family from?

Anna

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