<prompt> Haemoglobin first appears in which stage of erythropoiesis?Basophil erythroblastProerythroblastOhochromatic erythroblastPolychromatophil erythroblast  <response>: Once the proerythroblast has been formed, it divides multiple times, eventually forming many mature RBCs. The first-generation cells are called basophil erythroblasts because they stain with basic dyes; the cell at this time has accumulated very little hemoglobin. 