...Variations and genetic relationships of the garter-snakes... 
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...baudini and sordida wasthe result of genetic changes in geographically isolated populations...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Lackingevidence of genetic exchange, the two are held to be specificallydistinct...
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...This conservatism may result from thehistoric genetic "burden" of the species; that is to say, previousadaptive peaks may in part be evident in the matrix of contemporaryadaptation...
Richard F. Johnston 「The Breeding Birds of Kansas」
...In any event, genetic relationships are evident in the configurationof breeding seasons of many species here treated...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Of all bodily structures, the teeth apparentlyare under the most rigid genetic controls; they form early in the embryo andfollow rigidly specified patterns in their ontogeny...
Charles L. Douglas 「Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado」
...Furthermore, the confirmed presence of this species in the lowlands of El Petén suggests that there may be genetic connection between B...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...Some of these differences result fromthe differing environments where Anderson's study and my ownwere made and others certainly result from innate genetic differencesbetween the species...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...Furthermore, individual differencesin choice of breeding time probably result from environmental factorsrather than genetic factors in most instances...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...After geographical separation took place the initial genetic divergence between the two populations was maintained by means of ecological and ethological isolating mechanisms...
Juan R. León 「The Systematics of the Frogs of the Hyla Rubra Group in Middle America」
...Consequently, the embryonic features in their individual development mustalso have a genetic connection...
Ernst Haeckel 「The Evolution of Man」
...This middle position of the genetic connection of scales and hairs was advancedin my Systematic Phylogeny of the Vertebrates (p...
Ernst Haeckel 「The Evolution of Man」
...It has, however, no genetic connectionwith the primitive kidneys, but is a pouch-like growth from the anterior wallof the rectum (Fig...
Ernst Haeckel 「The Evolution of Man」
...Zoölogical research is largelydirected to the discovery of the genetic relations of animals...
J. W. Powell 「On Limitations To The Use Of Some Anthropologic Data」
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