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Updated: May 19, 2025
It is moreover, a very suggestive type, since the latency is manifestly of quite another character than for instance in the case of Mendelian hybrids, and probably more allied to those instances, where secondary sexual marks, which are as a rule only evolved by one sex, are transferred to the offspring through the other. Stripes are by no means limited to flowers.
Goddard received inspiration and suggestion from the Mendelian principles which dominate the work of the Eugenics Record Office, but has published his observations in detail so that the reader may test by them any theory he likes. This method can not be too highly commended for it gives permanent value to the publication, however much prevailing theories may change.
It is claimed by mutationists that mutations are not new combinations or separations of Mendelian unit characters already present, but are themselves new characters, though not always necessarily, as in the case of rubricalyx, new unit characters in the Mendelian sense.
Mendelism, since 1900, has studied experimentally the transmission of definite characters, and maintains that the characters of species are of the same nature as the characters which segregate in Mendelian experiments. Such characters are not in any way related to external conditions, and cannot, therefore, be adaptive except by accident.
As architects of human qualities the endocrines must be involved in the Mendelian unit factors. Moreover, they seem to act upon a particular locale in different degrees, which is the strongest argument against the resolution of a number of structural traits into Mendelian unit characters.
But this inheritance is almost invariably "recessive," in Mendelian terms, and a majority of the children of even the most rheumatic parent may entirely escape the disease, especially if they live rationally and vigorously, feed themselves abundantly, and avoid overwork and overcrowding. Our principal dread of a wound is from fear that it may fester instead of healing quickly.
This is not the result of a racial decay of the blonds, as the American, Dr. Charles Woodruff, supposes, but is to be accounted for by the fact that dark eyes seem to be a Mendelian dominant, and dark hair a more potent character than light. The inhabitants of these islands are nearly all long-headed, this being a characteristic of both the Nordic and Mediterranean races.
A factor in Mendelian experiments usually affects only one organ or one part of the organism. The factor for double hallux in fowls, for instance, may coexist with single comb or rose comb. The general impression produced on the mind by study of Mendelian phenomena is that the organism is a mosaic of which every element corresponds to a separate element in the chromosomes.
or heterozygote dominants and pure recessives in equal numbers. It is evident that the reproduction of the sexes is very similar to this. One of the remarkable facts about sex is that, although the uniting gametes are male and female yet they give rise to males and females in equal numbers. If one sex were a dominant this would be in accordance with Mendelian theory.
Professor Bateson has clearly shown that we shall be able duly to estimate environment only when Mendelian analysis has gone much further, and has instructed us in detail as to the nature of the material upon which environment is to act. For instance, there is the well-established fact that women who have undergone "higher education" show a low marriage-rate, and produce very few children.
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