The body of a vascular plant is developed in the first place by repeated division of the fertilized egg and the growth of Develop- the products of division.
The doubling process is provided by the act of fertilization, where an antherozoid with the single number of chromosomes fuses with an oosphere also with the single number to provide a fertilized egg with the double number.
Thus in Erythronium and Limnocharis the fertilized egg may form a mass of tissue on which several embryos are produced.
The fertilized egg charged with food reserves rests for a considerable period, surrounded by its cortex, the whole having assumed a reddish-brown colour.
Coleochaete sp., fertilized egg tion.
Weismann, however, doubts these conclusions, and having found a spermaster in every one of the eggs that he examined from workercells, and in only one out of 272 eggs taken from drone-cells, he supports Dzierzon's view, explaining the single exception mentioned above as a mistake of the queen, she having laid inadvertently this single fertilized egg in a drone instead of in a worker cell.