# ent

id: 28897
type: WORK_OF_ART
entity:
  DIFFERENT PARTS OF THE BODY IN THE SAME ANIMAL--THE ACT OF CROSSING A DIRECT CAUSE OF REVERSION, VARIOUS CASES OF, WITH INSTINCTS


# bib

id: 28897
title: The Variation of Animals and Plants Under Domestication, Volume II (of 2)
author: Darwin, Charles
txt: ./txt/28897.txt
cache: ./cache/28897.txt
extension: .txt
mime: text/plain
summary:
  ANIMALS AND PLANTS--REVERSION IN CROSSED VARIETIES AND SPECIES--REVERSION INDIVIDUAL ANIMALS--STERILITY OF PLANTS FROM CHANGED CONDITIONS OF DIFFERENCE IN FERTILITY BETWEEN CROSSED SPECIES AND VARIETIES--CONCLUSIONS SELECTION--INFLUENCE OF DIFFERENT BREEDERS ON THE SAME SUB-VARIETY--PLANTS varieties have probably in some cases run wild, and their crossing alone when they crossed certain breeds, pigeons coloured like the wild _C. distinct evidence that the crossing of differently-coloured varieties well with the converse case of domesticated animals and cultivated plants When fowls, pigeons, or cattle of different colours are crossed, cases, in which the breed has not been crossed, but some ancient character species (and conversely with the white-flowered variety), when crossed crossing of the differently coloured varieties of the same species, is PLANTS--STERILITY OF CROSSED SPECIES DUE TO DIFFERENCES CONFINED TO THE In some few cases varieties tend to keep distinct, by breeding at different plants crossed species should have been rendered sterile by a different


id: 26438
title: Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and Darwin
author: Ball, W. P. (William Platt)
txt: ./txt/26438.txt
cache: ./cache/26438.txt
extension: .txt
mime: text/plain
summary:
  The question whether the effects of use and disuse are inherited, or, in eye-stalks_ appear to illustrate the effects of natural selection rather use-inheritance, surely we may believe that natural selection, inheritance of the effects of use and disuse in kind_. use-inheritance as it undoubtedly is to effect great changes in direct SIMILAR EFFECTS OF NATURAL SELECTION AND USE-INHERITANCE. SIMILAR EFFECTS OF NATURAL SELECTION AND USE-INHERITANCE. natural selection are inherited effects of use or disuse. necessarily by directly inherited effects of use or disuse of parts in use-inheritance by natural or artificial selection acting upon general the alleged inheritance of the similar effects of use and disuse, unless The alleged inheritance of the effects of use and disuse in our domestic selection has shown itself in cases where use-inheritance could have WOULD NATURAL SELECTION FAVOUR USE-INHERITANCE? WOULD NATURAL SELECTION FAVOUR USE-INHERITANCE? various evil results of use-inheritance, natural selection would be


id: 34077
title: On Germinal Selection as a Source of Definite Variation
author: Weismann, August
txt: ./txt/34077.txt
cache: ./cache/34077.txt
extension: .txt
mime: text/plain
summary:
  protective coloring has selective value for the species, that is, that if will carry us in the explanation of such cases--natural selection, I mean, place where it is determined what variations of the parts of the organism by man rests on the fact that by means of the selection of individuals progressive variation of a given part is produced by continued selection in displacement of the zero-point of variation as the result of selection. that the displacement of the zero-point of variation by personal selection this or that primary variation''s being preferred, the selective process process of adaptation rested entirely {52} on personal selection. variation by personal selection, is impossible; for where all units are expected, if it is a fact that selection favors only the useful variations Without the Aid of Natural Selection_, 1894, regards the variations transforming the species, but that definitely directed variation is


id: 38584
author: Wollaston, Thomas Vernon
txt: ./txt/38584.txt
cache: ./cache/38584.txt
extension: .txt
mime: text/plain
summary:
  on Insect variation (with reference to external disturbing causes) to remark the variation to which certain insects are at times liable certain species, is not remarkable; but that every individual insect insect-aberration generally, whether regarded as a _universal fact_ appear to produce any very decided modifying effect on insect form, and which has been naturalized even in the Madeira Islands, passes insects is liable to be controlled by the physical state of the areas common in the other species of the generic group[26]." isolation over insect form is perhaps more especially to be detected influence of isolation and other circumstances on external insect There are many insects which appear to have _two distinct states_, case in the northern and southern ones), whilst in Madeira proper it the local nature of its various species, 152, 153. States, large and small ones indicated in some insects, 105.

title:
  On the Variation of Species, with Especial Reference to the Insecta Followed by an Inquiry into the Nature of Genera


id: 44582
title: Problems of Genetics
author: Bateson, William
txt: ./txt/44582.txt
cache: ./cache/44582.txt
extension: .txt
mime: text/plain
summary:
  quoted the two forms concerned are really distinct species, but the Species were formed by the act of Nature, who by inter-mixing the genera a natural and physiological distinction between species and variety. forms are this original parental species. type how comes it that B may range through some twenty distinct forms, Compare the condition of a variable form like the male Ruff (or in division may be presented by the bodies of animals and plants in forms case of a species which acquires a new factor and emits a dominant general rule that _species_-hybrids breed true, but that the cross-breds studied the curious colour variations of this species especially in the The relation of local forms to species has often been discussed from types as distinct species, but they are in any case closely allied, and special case of a problem which in its more general form is that of the


