Can an Uchiha master Sage Mode? If a child whose father is Uchiha and mother is Senju is born, will this child awaken the Rinnegan?
Will they be able to use Sage Mode because Senju have strong chakra to harness Sage Mode?
Well.. In order to awaken the Rinnegan, you need to have Ashura's and Indra's chakra. Having Uchiha and Senju DNA won't necessarily activate the Rinnegan unless those Uchiha and Senju are reincarnated Ashura and Indra.