▁quant itative ▁for ▁DNA . ▁It ▁is ▁possible ▁to ▁use ▁an ▁instrument ▁known ▁as ▁a ▁micro dens it ometer ▁or ▁mic ros pect roph ot ometer ▁to ▁actually ▁measure ▁the ▁intensity ▁of ▁the ▁p ink ▁Fe ul gen ▁reaction ▁for ▁a ▁given ▁organ elle . ▁Using ▁this ▁procedure , ▁it ▁was ▁early ▁determined ▁that ▁inter phase ▁cells ▁were ▁composed ▁of ▁two ▁populations , ▁those ▁with ▁dip lo id ▁DNA ▁and ▁those ▁with ▁t et rap lo id ▁DNA ▁( two ▁complete ▁genom es ). ▁The ▁nuc lei ▁looked ▁identical , ▁but ▁one ▁contained ▁twice ▁as ▁much ▁DNA . ▁This ▁gave ▁rise ▁to ▁the ▁division ▁of ▁the ▁inter phase ▁period ▁of ▁the ▁cell ▁cycle ▁to ▁G 1 , ▁S , ▁and ▁G 2 ▁phases ▁based ▁on ▁the ▁synth esis ▁of ▁that ▁extra ▁DNA . ▁ ▁References ▁ ▁Category : M icro sc opy ▁Category : M icro bi ology ▁techniques ▁Category : L abor atory ▁techniques ▁Category : St aining ▁Category : H ist ote chn ology ▁Category : St aining ▁d yes <0x0A> </s> ▁E ct o ed emia ▁gro sch ke i ▁is ▁a ▁moth ▁of ▁the ▁family ▁Ne pt icul idae . ▁It ▁is ▁found ▁in ▁the ▁eastern ▁Mediter rane an ▁Region . ▁ ▁There ▁are ▁three ▁gener ations ▁per ▁year . ▁ ▁The ▁lar va e ▁feed ▁on ▁V ite x ▁ag n us - cast us . ▁They ▁mine ▁the ▁leaves ▁of ▁their ▁host ▁plant . ▁The ▁mine ▁consists ▁of ▁a ▁narrow , ▁full - depth ▁cor rid or