The Relations of Inversions in the X Chromosome of Drosophila Melanogaster to Crossing over and Disjunction.
نویسندگان
چکیده
CONTENTS Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554 Inversions studied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555 Inversion scute-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556
منابع مشابه
Spermatogonial crossing over in Drosophila melanogaster and Drosophila ananassae.
FRIESEN (1936) induced crossing over in Drosophila males by X rays and found that most of the exchanges were in a preferred region, the complementary crossover classes were very unequal, and the percent recombination varied greatly from individual to individual. According to him, the data 'were sufficient to demonstrate the occurrence of spermatogonial crossing over. WHITTINGHILL (1937) found t...
متن کاملSome of Drosophila Melanogaster
LL present theories of crossing over tacitly assume that events in one tetA rad (at least as far as crossing over is concerned) are independent of those occurring in the other tetrads of the cell. Yet as long ago as 1919 STURTEVANT suspected that the presence of a heterozygous inversion in one chromosome pair increases crossing over in a non-homologous pair of chromosomes. The effect was defini...
متن کاملThe effect of heterozygous autosomal inversions on induced exchanges between the attached-X and Y chromosomes in Drosophila melanogaster females.
INCE the original observation of STURTEVANT (1919) a large body of data has accumulated substantiating the contention that, in Drosophila melanogaster females, inversion heterozygosity in one part of the genome increases the frequency of recombination in the remainder of the genome. This effect has been demonstrated for spontaneous meiotic crossing over (see, for instance, SCHULTZ and REDFIELD ...
متن کاملAPPLICATION OF THE “DISTRIBUTIVE PAIRING” HYPOTHESIS TO PROBLEMS OF SEGREGATION IN TRANSLOCATION HETEROZYGOTES OF DROSOPHILA MELANOGASTERl
HE distributive pairing hypothesis of GRELL (1962) aims to elucidate the Tmechanisms involved in chromosome pairing, exchange, and disjunction at meiosis in the female of Drosophila melanogaster. It provides a new interpretation of meiosis which can account for many of the seemingly contradictory reports on chromosome behaviour made by earlier authors. Former ideas on the nature of pairing and ...
متن کاملExchange within heterozygous inversions in Drosophila melanogaster.
The exchange behavior of non-attached, whole arm, X chromosome inversions was reexamined using nondisjunction in XXY females as an indirect measure of the frequency of nonexchange tetrads. Crossing over is quite normal in these inversion heterozygotes and is independent of the arrangement of the basal heterochromatin.
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ورودعنوان ژورنال:
- Genetics
دوره 21 5 شماره
صفحات -
تاریخ انتشار 1936