Titlebook: Genetic Mosaics and Cell Differentiation; W. J. Gehring Book 1978 Springer-Verlag Berlin Heidelberg 1978 Cell.Chimäre (Biol.).Drosophila.E

Fsh238

Mitotic Recombination and Position Effect Variegation,Mitotic recombination and position effect variegation have widely different underlying mechanisms.

停止偿付

Sexual Differentiation in Mammalian Chimaeras and Mosaics,Animals in which two genetically distinct populations of cells coexist are termed mosaics if both populations stem from a single fertilized egg, the product of two gametes. If more than one fertilized egg or more than two gametes are involved, the term chimaera is used.

焦虑

fluffy

反感

Gynandromorph Fate Maps in Drosophila, both male and female cells. If one of the two X chromosomes of a . embryo is lost, an XX//XO gynander. will develop with female XX and male (mutant) XO cells. By various methods XXY//XY gynanders or pure female XXY//XX or pure male XY//XO mosaics can also be obtained.

Odyssey

Cell Lineage and Differentiation in Drosophila,henotypic traits correspond to the activities of specific genes, and therefore, in the long run, differentiation has to be explained in terms of selective gene activities. The mechanisms by which particular genes are expressed in certain cell types and not in others remain one of most appealing problems of modern biology.

circumvent

现代

https://doi.org/10.1007/978-3-8349-4519-8t is rather unfortunate that ., the classical object of genetic research, should happen to have a mosaic type of development” (Needham, 1950). I do not think that it is superfluous to remind ourselves that during the past two decades, however, this gloomy notion has become irrelevant since new genet

食物

https://doi.org/10.1007/978-3-8349-9666-4 nuclei prior to blastula stage are held together in a syncytial mass; both indirect (fate maps) and direct experiments (nuclear transplantation) show cleavage nuclei to be without developmental specificity. The suggestion has been made that earliest determination occurs at the blastula stage (Chan

整体

Investitionen, Personal und Wachstum,cal example of such cell groups is the imaginal discs, clusters of cells in the larva determined to form specific regions of the adult. Because the discs cannot be identified in early stages during embryogenesis, their origin and early development can best be studied using cell lineage techniques su