If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course...

First LawIn every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually strengthens, develops and enlarges that organ, and gives it a power proportional...

There are species that retain their characteristics even in conditions that are relatively different from their natural ones; other species in similar circumstances instead become extinct; otherwise what takes place is racial mixing with other...

A four-letter alphabet called DNA.

A hereditary monarch is as absurd a position as a hereditary doctor or mathematician.

Of the contributions made during the essayist period three call for notice: Weismann deserves mention for his useful work in asking for the proof that “acquired characters” or, to speak more precisely, parental experience can...

For it is not cell nuclei, not even individual chromosomes, but certain parts of certain chromosomes from certain cells that must be isolated and collected in enormous quantities for analysis; that would be the precondition...

Jem made the little Scottish noise again, and Brianna looked sideways at him.”Are you doing that on purpose?”He looked up at her, surprised. “Doing what?””Never mind. When you are fifteen, I’m locking you in the...

I may finally call attention to the probability that the association of paternal and maternal chromosomes in pairs and their subsequent separation during the reducing division as indicated above may constitute the physical basis of...

Malcolm Gladwell can’t help being a pinhead. He was probably born that way.

History is hereditary only in this way: we, all of us, inherit everything, and then we choose what to cherish, what to disavow, and what do do next, which is why it’s worth trying to...

Human beings are ultimately nothing but carriers-passageways- for genes. They ride us into the ground like racehorses from generation to generation. Genes don’t think about what constitutes good or evil. They don’t care whether we...