Nucleolar organizer is separated from rest of chromosome? A) Primary constriction B) Chromomere C) Secondary constriction D) Centromere Related MCQs: Nucleolar organizer contains …… tRNA genes? In oocyte development lamp brush chromosome serves as the hub of …… activity? With respect to outside, the inside of neutron is at rest is ……? Which of the following is called an acrocentric chromosome?