In looking at comparisons of my WGS sequence with the Altai Neanderthal sequence, with the help of the 1000 Genomes frequency data, I realized that there is a span of 16,813 bases on chromosome 1 over which 73 of my 83 Neanderthal SNPs are also shared by some Africans. This seems to indicate introgression into Africans from an unknown hominin which differed from Neanderthal in only 20 SNPs (10 on each side from their common ancestor) out of 16,813 bases, or 0.11%. This contrasts with the circa 83 differences (0.49%) between humans and Neanderthals over this same span. The current dogma is that the Neanderthal introgression into humans excluded Africans because it occurred after the involved humans had left Africa. The above data doesn't contradict this, but does indicate that Africans were also involved in introgression with hominins. This has already been seen by Bonnie and Thomas in the Y chromosome and maybe by others in the autosomes, but I thought the above chromosome 1 data is nevertheless interesting. I am attempting to paste the data below, and I hope it is readable. The chimp data was also obtained from 1000 Genomes. The Altai Neanderthal data is from the downloaded BAM file of the Prufer et al. 2013 Nature paper. Abbreviations: EUR=Europeans; AFR= Africans; SAS= South Asians; EAS= East Asians From 1000 Genomes data). The GRCh 37 human reference sequence is used for comparison. SNP Location Alleles Neanderthal reads Minor allele frequencies in modern humans Chimp (ancestral?) allele (maj/min) (Altai) (*=minor allele) rs138362218 13996258 G/A 4A EUR .0169, AFR .0242, SAS .1483, EAS .0208 G rs114817378 13996689 C/T 4T EUR .0169, AFR .0303, SAS .1483, EAS .0208 C rs116756003 13997067 G/A 5A EUR .0169, AFR .0242, SAS .1483, EAS .0208 A* rs192026872 13997273 G/A 1A EUR .0169, AFR 0 , SAS .1237, EAS .0208 G rs371294415 13997279 C/T 2T EUR .0169, AFR .0303, SAS .1483, EAS .0208 C rs114853943 13997512 G/C 1C EUR .0169, AFR .0234, SAS .1299, EAS .0208 G rs140454319 13997848 T/C 1C EUR .0169, AFR .1036, SAS .1472, EAS .0208 C* rs184828566 13998383 T/C 4C EUR .0169, AFR 0 , SAS .1217, EAS .0218 T rs145025374 13998735 A/C 3C EUR .0209, AFR .0182, SAS .1483, EAS .0218 A rs116406995 13998735 T/C 3C3T EUR .0209, AFR 0 , SAS .1227, EAS .0218 T rs143118004 13999113 G/A 2A EUR .0209, AFR .0386, SAS .1472, EAS .0218 G rs138394326 13999121 G/T 2T EUR .0209, AFR .0386, SAS .1472, EAS .0209 G rs142386605 13999153 C/T 3T EUR .0209, AFR .0386, SAS .1472, EAS .0218 C rs141590326 13999256 G/A 8A EUR .0209, AFR .0393, SAS .1472, EAS .0218 G rs77005299 13999364 A/G 3G EUR .0209, AFR .0393, SAS .1472, EAS .0218 G* rs113235120 13999614 A/G 4G EUR .0209, AFR .0401, SAS .1472, EAS .0218 A rs111871728 13999619 T/C 4C EUR .0209, AFR .0401, SAS .1472, EAS .0218 C* rs143266882 14000071 T/C 1C EUR .0209, AFR .0401, SAS .1472, EAS .0218 C* rs4421585 14000722 T/C 2C EUR .0209, AFR .0227, SAS .1472, EAS .0218 C* rs4480350 14000765 G/C 3C EUR .0209, AFR .0227, SAS .1472, EAS .0218 C* rs80104731 14000782 C/T 1T EUR .0209, AFR .0401, SAS .1472, EAS .0218 C rs78565867 14001635 C/T 3T EUR .0209, AFR .0234, SAS .1472, EAS .0218 T* rs77349561 14001835 T/G 3G EUR .0209, AFR .0234, SAS .1472, EAS .0218 T rs112032437 14002009 G/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 G rs74826526 14002168 C/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs113475021 14002412 C/T 2T EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs116606690 14002571 T/C 4C EUR .0209, AFR .0234, SAS .1227, EAS .0218 T rs148169628 14002643 C/T 3T EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs148883391 14002843 -/C 9C EUR .0209, AFR 0 , SAS .1227, EAS .0218 - rs112170681 14003344 T/C 2C EUR .0209, AFR .0234, SAS .1472, EAS .0218 C* rs112331292 14003485 G/A 5A EUR .0209, AFR .0234, SAS .1472, EAS .0218 G rs111277821 14003646 C/G 2G EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs74569552 14003770 T/C 4C EUR .0209, AFR .0234, SAS .1472, EAS .0218 C* rs111569874 14003858 A/G 1G EUR .0209, AFR .0234, SAS .1472, EAS .0218 G* rs78623804 14004003 T/C 5C EUR .0209, AFR .0234, SAS .1472, EAS .0218 T rs149459157 14004004 G/A 5A EUR .0209, AFR 0 , SAS .1227, EAS .0218 G rs78823979 14004054 A/G 5G EUR .0209, AFR .0234, SAS .1472, EAS .0218 G* rs76069246 14004191 C/A 4A EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs116523708 14004332 T/A 5A EUR .0209, AFR .025 , SAS .1472, EAS .0218 A* rs116077027 14004401 C/T 5T EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs116295581 14004402 A/G 5G EUR .0209, AFR .0234, SAS .1472, EAS .0218 A rs75346192 14004433 A/C 3C EUR .0209, AFR .0234, SAS .1472, EAS .0218 C* rs75825134 14004513 T/C 2C EUR .0209, AFR .0234, SAS .1472, EAS .0218 C* rs112618706 14004630 T/G 4G EUR .0209, AFR .0234, SAS .1472, EAS .0218 T rs2487649 14004982 T/C 2C EUR .0378, AFR .0628, SAS .1616, EAS .0248 C* rs147830865 14005032 A/T 4T EUR .0209, AFR 0 , SAS .1227, EAS .0218 A rs113266271 14005174 G/A 6A EUR .0209, AFR .0234, SAS .1483, EAS .0218 G rs115968025 14005294 A/G 5G EUR .0209, AFR .0234, SAS .1472, EAS .0218 G* rs116376107 14005460 C/A 6A EUR .0209, AFR 0 , SAS .1227, EAS .0218 C rs79261491 14006205 T/C 5C EUR .0209, AFR 0 , SAS .1227, EAS .0218 T rs76470348 14006526 A/G 3G EUR .0209, AFR .0234, SAS .1472, EAS .0218 A rs77839177 14006530 A/T 3T EUR .0209, AFR .0234, SAS .1472, EAS .0218 T* rs150413585 14006543 G/T 1T EUR .0268, AFR .0091, SAS .1258, EAS .0218 G rs145192738 14006733 C/T 5T EUR .0234, AFR .0234, SAS .1452, EAS .0218 C rs193063159 14006737 T/G 4G EUR .0199, AFR .0242, SAS .1452, EAS .0228 G* rs112459033 14006924 G/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 A* rs115179140 14006949 C/T 3T EUR .0219, AFR .0234, SAS .1472, EAS .0218 T* rs139346965 14007017 A/- 3- EUR .0209, AFR .0234, SAS .1472, EAS .0218 ? rs112856063 14007101 G/A 2A EUR .0209, AFR .0234, SAS .1472, EAS .0218 G rs79816977 14007170 T/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 A* rs76862812 14007243 C/T 4T EUR .0209, AFR .0234, SAS .1472, EAS .0218 T* rs75110225 14007348 C/A 2A EUR .0209, AFR .0234, SAS .1472, EAS .0218 C rs142167205 14007398 A/C 3C EUR .0209, AFR .0234, SAS .1472, EAS .0218 A rs141676355 14007466 A/G 3G EUR .0209, AFR .0234, SAS .1472, EAS .0218 G* rs147434972 14007584 G/A 2A EUR .0209, AFR .0234, SAS .1472, EAS .0218 A* rs139736364 14007611 G/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 G rs112213639 14007698 A/G 2G EUR .0209, AFR .0234, SAS .1472, EAS .0218 G* rs140541215 14007782 -/C 2C EUR .0209, AFR .0234, SAS .1483, EAS .0218 ? rs75283449 14007885 G/A 3A EUR .0209, AFR .0234, SAS .1472, EAS .0218 A* rs78991687 14007903 C/T 4T EUR .0209, AFR .0234, SAS .1472, EAS .0218 T* rs113346922 14008623 A/G 3G EUR .0209, AFR .0408, SAS .1472, EAS .0218 A rs79514290 14009214 T/C 8C EUR .0209, AFR .0234, SAS .1472, EAS .0218 T rs76112447 14009354 C/T 6T EUR .0209, AFR .0303, SAS .1472, EAS .0218 T* rs116062697 14009532 C/A 1A EUR .0209, AFR .0083, SAS .1472, EAS .0218 A* rs115061187 14009638 G/A 10A EUR .0209, AFR 0 , SAS .1227, EAS .0218 G rs2487652 14009859 G/A 3A EUR .0378, AFR .0877, SAS .137 , EAS .0248 G rs80009382 14010855 T/C 4C EUR .0209, AFR .0083, SAS .1524, EAS .0218 C* rs142445912 14010936 T/- 1- EUR .0209, AFR .0106, SAS .1544, EAS .0218 ? rs143728452 14011257 A/G 2G EUR .0209, AFR 0 , SAS .1227, EAS .0218 A rs143810446 14011863 CTGA/- 2- EUR .0209, AFR .0083, SAS .1524, EAS .0218 ? rs75012279 14011918 T/G 2G EUR .0209, AFR .0083, SAS .1524, EAS .0218 T rs117406744 14013026 A/G 3G EUR .0209, AFR .0083, SAS .1524, EAS .0218 A rs114006744 14013070 G/T 4T EUR .0209, AFR .0083, SAS .1524, EAS .0218 G