ABSTRACT
Development of unreduced embryo sacs is directly from the somatic cells located in the center of the nucellus. There may be multiple embryo sacs in an ovule but only one of them matures into an aposporous embryo sac. Karyogram is the physical measurement of the chromosomes from a photomicrograph where chromosomes are arranged in descending order. An idiogram represents a diagrammatic sketch of the karyogram. The kinetochore position is a very useful landmark for the morphological identification and nomenclature of chromosomes. A satellite as a part of the chromosome distal to a nucleolar constriction and it is universally accepted that for each satellite there is one nucleolus. It is an established fact that a satellite has a spheroidal body and diameter that is either the same or smaller than the diameter of the chromosomes, situated at one extremity, connected to the chromosome body by a thin thread.
