Amongst other lines of inquiry, the so-called Mendelian experiments promise to clear up much that is at present dark.
The development of the individual that results from such cell-union is no mere mixture or addition, but a process of selective organization.
To put it very absurdly, one does not find a pair of two-legged parents having a child with legs as big as the two sets of legs together, or with four legs, two of them of one shape and two of another.

In other words, of the possibilities contributed by the father and mother, some are taken and some are left in the case of any one child.

Further, different children will represent different selections from amongst the germinal elements.

Mendelism, by the way, is especially concerned to find out the law according to which the different types of organization are distributed between the offspring.

Each child, meanwhile, is a unique individual, a living whole with an organization of its very own.