os om al ▁c ros so ver ) ▁mix es ▁gen es ▁from ▁non - s ister ▁chrom at ids ▁from ▁both ▁parents ▁during ▁me ios is , ▁thus ▁mud d ling ▁the ▁ancest ry ▁path . ▁ ▁However , ▁the ▁mit och ond rial ▁DNA ▁( mt D NA ) ▁is ▁imm une ▁to ▁sexual ▁mixing , ▁unlike ▁the ▁nuclear ▁DNA ▁whose ▁chrom os om es ▁are ▁sh uff led ▁and ▁re comb ined ▁in ▁M end elian ▁inheritance . ▁M ito ch ond rial ▁DNA , ▁therefore , ▁can ▁be ▁used ▁to ▁trace ▁mat ril ine al ▁inheritance ▁and ▁to ▁find ▁the ▁M ito ch ond rial ▁E ve ▁( also ▁known ▁as ▁the ▁African ▁E ve ), ▁the ▁most ▁recent ▁common ▁ancest or ▁of ▁all ▁humans ▁via ▁the ▁mit och ond rial ▁DNA ▁path way . ▁ ▁Do ▁good ▁by ▁ste alth ▁▁ ▁The ▁main ▁them es ▁of ▁the ▁third ▁chapter ▁are ▁borrow ed ▁from ▁Daw kins ' ▁own ▁book , ▁The ▁Bl ind ▁Watch maker . ▁This ▁chapter ▁shows ▁how ▁the ▁grad ual , ▁continuous ▁and ▁cum ulative ▁enh ancement ▁to ▁organ isms ▁via ▁natural ▁selection ▁is ▁the ▁only ▁mechanism ▁which ▁can ▁explain ▁the ▁complexity ▁we ▁observe ▁all ▁around ▁us ▁in ▁nature . ▁Daw kins ▁ad am antly ▁ref utes ▁the ▁" I ▁cannot ▁believe ▁so ▁and ▁so ▁could ▁have ▁evol ved ▁by ▁natural ▁selection " ▁argument ▁of ▁Cre ation ists , ▁calling ▁it ▁the ▁Argument ▁from ▁Personal ▁In cred ul ity . ▁ ▁Cre ation ists ▁often ▁claim