by means of a cytological technique involving 5-bromodeoxyuridine , acridine orange , and fluorescence microscopy , the asynchronously replicating , hence genetically inactivated , x chromosome was identified in 6- to 8-day embryos from female mice heterozygous for searle 's translocation t ( x ; 16 ) 16h ( abbreviated as t16h ) mated with either karyotypically normal males or males carrying cattanach 's translocation t ( x ; 7 ) 1ct in order to analyse the way in which the total inactivation of the normal x is achieved in adult t16h heterozygotes .
C0043292
x chromosome
C0043297
inactivation