Lactose tolerance falls a little short of deriving a new species, but those Darwinists will take what they can get.
I, for one, can see how human development of tolerance for lactose demonstrates a process by which humans could have easily developed from single cell organisms. How could I have ever had any doubts.
Darwinists define evolution as any change whatsover. Whether helpful or harmful, whether "progress" or "regress" (meaningless terms for them, of course).
Very low threshold for this fairy tale of a theory.
Convergent adaptation of human lactase persistence in Africa and Europe
A SNP in the gene encoding lactase (LCT) (C/T-13910) is associated with the ability to digest milk as adults (lactase persistence) in Europeans, but the genetic basis of lactase persistence in Africans was previously unknown. We conducted a genotype-phenotype association study in 470 Tanzanians, Kenyans and Sudanese and identified three SNPs (G/C-14010, T/G-13915 and C/G-13907) that are associated with lactase persistence and that have derived alleles that significantly enhance transcription from the LCT promoter in vitro. These SNPs originated on different haplotype backgrounds from the European C/T-13910 SNP and from each other. Genotyping across a 3-Mb region demonstrated haplotype homozygosity extending >2.0 Mb on chromosomes carrying C-14010, consistent with a selective sweep over the past 7,000 years. These data provide a marked example of convergent evolution due to strong selective pressure resulting from shared cultural traits—animal domestication and adult milk consumption.