Board Thread:Theories and Speculation/@comment-3568954-20150210145020/@comment-26112212-20150210193649

The chakra transferred to Naruto was Kushina's chakra but it is also be possible that Kurama's chakra got mixed, hence he developed whisker markings. Ginkaku and Kinkaku also had Whisker markings and Minato and Kushina had no markings so it's not out of realm of possibility that chakra was transferred to his children and the children inherited some of Kurama's chakra.