Ask A Korean! Wiki
Ah, the genetics of purple hair. Skin and hair shade come from the pigment melanin. There are two types of melanin, eumelanin, which is black or brown, and pheomelanin, which is pink. Red hair comes from having low ranges of eumelanin and excessive ranges of pheomelanin. Most traditional, full-on gingers actually can not make eumelanin in any respect because they’ve two mutant copies of a gene referred cheap human half wigs to as MC1R, which causes eumelanin manufacturing. (Remember, you may have two copies of almost each gene, so both copies of a gene must be dysfunctional in order to get the mutant phenotype.)
So, let’s assume that the gf has two mutant copies of MC1R. Which means the offspring are going to get not less than one mutant copy of MC1R. If the bf had been full Korean, he would definitely have 2 regular copies of MC1R, and the offspring would have one regular copy and one mutant copy: dark hair, most likely closer to brown than black, but definitely not red. However, the bf is half Korean and half Irish Canadian. If there’s crimson hair in his dad’s family (or even when there isn’t), the copy of MC1R from the dad is likely to be mutant. If that’s the case, he cheap human half wigs is bought a 50% likelihood of a darkish-haired baby and 50% probability of a ginger.