I read in a paper something on allele frequency that says:
We identified differences between human genomes and the inferred human-chimpanzee ancestral genome where humans carry a derived allele with a frequency of at least 95% (14.9 million SNVs and 1.7 million indels). Nearly all of these events are fully fixed in the human lineage, with fewer than 5% appearing as nearly fixed poly- morphisms in the 1000 Genomes Project variant catalog (derived allele frequency (DAF) ≥ 95%).
I don''t have much background on allele frequency and evolution theory. I'm curious what does a high DAF mean? Does it mean that between human and chimps, most derived alleles are now fixed (as they are over 95% meaning 95% of the human population have a particular derived allele)? And DAF of 95% doesn't suggest anything on whether there is positive or negative selections on derived alleles? Is my understanding correct?