C. Nuclear chromatin structure

1. The most immature form of the rbc is the blast which has prominent nucleoli within the nucleus. As the cell matures, the chromatin pattern becomes more course and dense, resulting in pyknotic nucleus which is seen through the metarubricyte stage.

1. The most immature form of the rbc is the blast which has prominent nucleoli within the nucleus. As the cell matures, the chromatin pattern becomes more course and dense, resulting in pyknotic nucleus which is seen through the metarubricyte stage.