Hormones and Heredity A Discussion of the Evolution of Adaptations and the Evolution of Species

As one of the most remarkable examples of metamorphosis and recapitulation in connexion with adaptation we will consider once more the case of the Flat-fishes which I have alrea...

We have next to consider what are commonly called secondary sexual characters. These are characters or organs more or less completely limited to one sex. When we distinguish in...

The study of the animals and plants now living on the earth naturally divides itself into two branches, the one being concerned with their structure and classification, the othe...

According to the theory here advocated, modifications produced by external stimuli in the soma will also be inherited in some slight degree in each generation when they have no...

We know that now individuals are developed from single cells which have either been formed by the union of two cells or which develop without such union, and that these reproduc...

In his _Mendel's Principles of Heredity_, 1909, Bateson does not discuss the nature of somatic sex-characters in general, but appears to regard them as essential sex-features, a...

which it seems to me has been increased rather than decreased by the progress of research concerning heredity and evolution since that date. Dr. Woodland correlated the dislocat...

Perhaps the most remarkable of all somatic sexual characters are those which are almost universal in the whole class of Mammalia, the mammary glands in the female, the scrotum i...

Weismann, strongly as he denied the possibility of the transmission of somatic modifications, admitted the possibility or even the fact of the simultaneous modification of soma...