3 ms·
Genetics are weird. I have received next to nothing from certain ancestors, and quite a bit from others as far as DNA testing is concerned. Likewise, in a litho
by BirAdam 3y ago
Genetics are weird. I have received next to nothing from certain ancestors, and quite a bit from others as far as DNA testing is concerned. Likewise, in a lithograph of one I can see an ancestor who looks nearly identical to a half brother of mine. Shit is so weird.
- KMag 3y agoIt's not so weird. My understanding is that genes migrating across chromosomes (translocation) isn't that common. So, to a first approximation, genes are inherited as 46 indivisible units. Every generation, a given chromosome has a 50/50 chance of getting dropped. You have exactly 23 chromosomes from your mother, an expected value of 11.5 chromosomes from your maternal grandmother, expected 5.75 chromosomes from her mother... another 3 generations back and you've got less than a 50% probability of getting any chromosomes from that particular relative.