I come from a very tall family.  I am 6 foot 6. I think the population are getting taller and taller with each new generation.  What do you think?
I agree. Measuring from the bottom of my feet to the top of my head, I'm only 5'4", so you're a lot taller than I am. 
Are your parents tall? I think it is interesting that we take so much from are parents
No actually. My mom is shorter than I am and my dad was average height. There's a genetic profile in males called Y haplotype I-M170 is related to height.
Oh is that right? and what does it mean?
It's a Y chromosome DNA haplogroup.
Oh ok.  I dont know alot about that.  Does that determine your height then?
Yes it does. It's also one of the common haplogroups with European males.
fascinating.  Thanks for sharing that.  Nice chatting.