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Updated: June 27, 2025
Nine of these mutants have been recognised and defined, and distinguished by different names. The characters are precisely described and in many cases figured by Gates in the volume cited above. The first mutant to be recognised in 1887 was one called lata.
In previous lectures I have mentioned that I have saved the seeds of the mutants whenever possible, and have always obtained repetitions of the prototype only. Reversions are as absolutely lacking as is also a further development of the new type. Even in the case of the inconstant forms, where part of the progeny yearly return to the stature of lamarckiana, intermediates are not found.
The observation of the production of mutants in the field at Hilversum, and the subsequent cultivation of the new types in the garden at Amsterdam, gives ample proof of the mutability of plants. Furthermore it furnishes an analogy with the hypothetical origin of the swarms of species of Draba and Viola.
Moreover I observed that the attributes of lata and nanella, which I now studied in the offspring of my first mutants, were clearly discernible in extreme youth, while those of rubrinervis remained concealed some weeks longer. Hence I concluded that the young plants should be examined from time to time until they proved clearly to be only normal lamarckiana.
Summing up the result of our facts and discussions we may state that wild new elementary species and varieties are recorded to have appeared from time to time. Invariably this happened by sudden leaps and without intermediates. The mutants are constant when propagated by seed, and at once constitute a new race.
No reversion accompanies mutation, and this fact is perhaps the completest contrast in which these two great types of variability are opposed to each other. The offspring of my mutants are, of course, subject to the general laws of fluctuating variability. They vary, however, around their own mean, and this mean is simply the type of the new elementary species.
In many cases, their children were mutants not monsters, although there were many of them, too, which did not survive but humans who were immune to radioactivity." "An interesting theory, Kradzy Zago," the soldier commented. "And one which conforms both to what we know of atomic energy and to the ancient legends. Then you would say that those radiations are still deadly to the non-immune?"
And mankind had a history of dealing harshly with its mutants. So Beta would play it safe. Kennon wondered if there were other worlds in the Brotherhood that had come to the same conclusion. Possibly there were. And possibly there were worlds where marked deviations had occurred.
The eye of the wild original fly is red, one of the mutants has a white eye, i.e. the red colour and its factor are absent. When a white-eyed male is mated to a red-eyed female all the offspring have red eyes.
Intermediate forms, if not occurring in the direct line from one species to another, might be expected to appear perhaps on lateral branches. In this case the mutants of one type, appearing in the same year, would not be a pure type, but would exhibit different degrees of deviation from the parent. The best would then have to be chosen in order to get the new type in its pure condition.
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