remove_inherited_descendent_traits_effect

remove_inherited_descendent_traits_effect = {
	if = {
		limit = {
			has_trait = sayyid
			exists = scope:real_father
			NOT = {
				scope:real_father = { has_trait = sayyid }
			}
		}
		remove_trait = sayyid
	}
	if = {
		limit = {
			has_trait = golden_lineage
			exists = scope:real_father
			NOT = {
				scope:real_father = { has_trait = golden_lineage }
			}
		}
		remove_trait = golden_lineage
	}
}

As written in game/common/scripted_effects/00_bastard_effects.txt.