Mammalian chromosomes in vitro. V

Abstract

The application of a prefixation treatment to cells in tissue culture with a hypotonic solution facilitates crucial studies on the chromosome morphology of the Norway rat (Rattus norvegicus), especially for the location of the centromeric positions in the prometaphase and metaphase figures. Evidence is presented that of the diploid group of the rat eight autosomal pairs and the X-element consist of two-armed chromosomes. © 1954, Japan Mendel Society, International Society of Cytology. All rights reserved.