DYSGENIC (bad origin), tending to impair the racial qualities
of future generations; the opposite of eugenic.
ENDOGAMY (within mating), a custom of some primitive peoples,
in compliance with which a man must choose his wife from his own group
(clan, gens, tribe, etc.).
EUGENIC (good origin), tending to improve the racial qualities
of future generations, either physical or mental.
EUTHENIC (good thriving), tending to produce beneficial
acquired characters or better conditions for people to live in, but not
tending (except incidentally and indirectly) to produce people who can
hand on the improvement by heredity.
EVOLUTION (unroll), ORGANIC, the progressive change of
living forms, usually associated with the development of complex from
simple forms.
EXOGAMY (out mating), a custom of primitive peoples which
requires a man to choose a wife from some other group (clan, gens,
tribe, etc.) than his own.
FACTOR (maker), a name given to the hypothetical _something_,
the independently inheritable element in the germ-cell, whose presence
is necessary to the development of a certain inherited character or
characters or contributes with other factors to the development of a
character. "Gene" and "determiner" are sometimes used as synonyms of
factor.
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