incapable of undertaking affairs which demand judgment or
involve unrestricted competition with normal individuals. Their
intelligence ranges with that of normal children from seven to twelve
years of age." There is necessarily a considerable borderline, but any
adult whose intelligence is beyond that of the normal twelve-year-old
child is usually considered to be not feeble-minded.

GAMETE (mate), a mature germ-cell; in animals an ovum or
spermatozooen.

GENETICS (origins), for a long time meant the study of
evolution by experimental breeding and was often synonomous with
Mendelism. It is gradually returning to its broader, original meaning of
the study of variation and heredity, that is, the origin of the
individual's traits. This broader meaning is preferable.

GERMINAL (sprig), due to something present in the germ-cell. A
trait is germinal when its basis is inherited,--as eye color,--and when
it develops with nothing more than the standard environment; remaining
relatively constant from one generation to another, except as influenced
by reproduction.

GERM-PLASM (sprig form), mature germ-cells and the living
material from which they are produced.

HAEMOPHILIA (blood love), an inability of the blood to clot. It
thus becomes impossible to stop the flow of blood from a cut, and one
who has inherited haemophilia usually dies sooner or later from
haemorrhage.

HEREDITY (heirship), is usually considered from the outside,
when it may properly be defined as organic resemblance based on descent,
or the correlation between relatives. But a better definition, based on
the results of genetics, looks at it as a mechanism, not as an external
appearance. From this point of view, heredity may be said to be "the
persistence of certain cell-constituents (in the germ-cells) through an
unending number of cell-divisions."

HETEROZYGOTE (different yolk), a zygotic individual which
contains both members of an allelomorphic pair.

HOMOZYGOTE (same yolk), an individual which contains only one
member of an allelomorphic pair, but contains that in duplicate, having
received it from both parents. A homozygous individual, having been
formed by the union of like gametes, in turn regularly produces gametes
of only one kind with respect to any given factor, thus giving rise to
offspring which are, in this regard, like the parents; in other words,
homozygotes regularly "breed true." An individual may be a homozygote
with respect to one f