Show key to heredity found by the busy scientist scientists working to solve the mysteries of heredity have been given a key to many of their problems with the discovery of ft a giant chromosome in the salivary gland bland of the yeast fly says gays pathfinder magazine some 70 times normal size this oversized over oter sized model ot of cell brings into identifiable clearness the genes held thereon it Is the genes in which the scientists have the greatest interest since they are the units controlling heredity arranged in long strings string ii on each chromosome a complete set seit Is contained in each cell and therefore the giant chromosome Is IL a large scale model of all its smaller brothers in the case of the yeast fly it Is thought that between 2000 and genes are contained la in each cell and since the ordinary chromosome Is only 15 one hundred thousandths of an inch long it Is easy to see the minuteness of each gene there Is now proof of the existence of genes and a few of these have been individually identified each one has its individual function such as controlling the color of the eyes in the human or the formation of the black speck under the wins wing of the fly etc |