ant ▁decrease , ▁the ▁pro gen y ▁eventually ▁return ▁to ▁M end elian ▁inheritance ▁of ▁the ▁wild - type ▁pa wn - B ▁alle les . ▁▁ ▁While ▁the ▁exact ▁structure ▁of ▁the ▁ampl ified ▁copies ▁of ▁the ▁alle le ▁in ▁the ▁mic ron uc le us ▁is ▁not ▁currently ▁known , ▁it ▁appears ▁to ▁be ▁consistent ▁with ▁the ▁original ▁mic ron uc lear ▁loc us , ▁as ▁opposed ▁to ▁the ▁loc us ▁of ▁the ▁mac ron uc le us , ▁which ▁includes ▁regions ▁not ▁found ▁in ▁the ▁mic ron uc lear ▁loc us . ▁Additionally , ▁in ▁some ▁of ▁the ▁back cross es , ▁extra ▁copies ▁of ▁the ▁gene ▁were ▁still ▁present , ▁even ▁after ▁multiple ▁gener ations . ▁It ▁is ▁not ▁clear ▁whether ▁this ▁is ▁due ▁to ▁tight ▁link age ▁of ▁the ▁gene ▁copies ▁to ▁the ▁original ▁loc us , ▁or ▁because ▁of ▁continued ▁gene ▁dup lication ▁of ▁the ▁remaining ▁copies , ▁but ▁it ▁appears ▁that ▁it ▁is ▁more ▁likely ▁due ▁to ▁continued ▁dup lication , ▁as ▁the ▁number ▁of ▁copies ▁of ▁the ▁mut ant ▁pa wn - B ▁vary ▁between ▁the ▁independent ▁cl ones ; ▁it ▁is ▁also ▁possible ▁that ▁there ▁is ▁an ▁extra chrom os om al ▁element ▁that ▁plays ▁a ▁role , ▁which ▁has ▁been ▁observed ▁in ▁other ▁proto zo a . ▁ ▁References ▁▁ ▁Category : Model ▁organ isms <0x0A> </s> ▁P ank aj ▁M ish ra ▁( born ▁ 1 9 6 9 ) ▁is ▁an ▁Indian ▁ess ay ist ▁and ▁novel ist . ▁He ▁is