germ-cells

Can we suppose that the _consensus_ of the activities of the working bee impresses itself on the sperm-cells of the drones and on the germ-cells of the carefully secluded queen?

Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and Darwin

The massacre or expulsion of the drones would have to impress itself on the germ-cells of an onlooking queen, and the imprisonment of the queen on the sperm-cells of the drones -- and in such a way, moreover, as to be afterwards developed into action in the neuters only.

Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and Darwin

Darwin provisionally suggested that every cell of every organism gives off minute particles which become congregated in the germ-cells, and that these cells thus contain representative portions of all parts of the parent's body.

Recent Developments in European Thought Various

Its essence is, firstly, that the various characteristics of an organism are in general inherited quite independently of one another; and, secondly, that the germ-cells of a hybrid are pure in respect of any one character, that is to say, that any one germ-cell can only transmit any unit character as it was received from one parent or the other, and not a combination of the two.

Recent Developments in European Thought Various

If the germ-cells contain representatives of all parts of the body, modifications impressed on the body during its life may at least possibly be transmitted to offspring born after the modifications have taken place.

Recent Developments in European Thought Various

In recent years great progress has been made in correlating the phenomena of heredity and of the determination of sex with the visible structural features of the germ-cells.

Recent Developments in European Thought Various

If, however, the germ-cells are independent of the rest of the body, and only stored within it for safe-keeping like a deed-box in the vaults of a bank, it would seem impossible for any environmental influence, whether for good or ill, to take effect on the offspring.

Recent Developments in European Thought Various

Before the appearance of Weismann's work, the germ-cells, which bear somehow or other the hereditary characters that appear in the offspring, were supposed to be produced directly from the body of the parent.

Recent Developments in European Thought Various

Although the matter is far from being completely known, the results obtained make it almost indubitable that inherited characters are in some way borne by the _chromosomes_ in the nuclei of the germ-cells.

Recent Developments in European Thought Various

In tracing the behaviour of any one part or function, whether it be the conduction of a nervous impulse, the supply of oxygen to the tissues by the blood, or the transmission of inherited characters by the germ-cells, we may be able to give a more or less complete physico-chemical or mechanical account of the process.

Recent Developments in European Thought Various