TEMPERATURE SENSITIVITY OF SEGREGATION-DISTORTION IN DROSOPHILA MELANOGASTER
نویسندگان
چکیده
منابع مشابه
Temperature sensitivity of negative segregation distortion in Drosophila melanogaster.
Previous work has shown that the direction of segregation distortion in the SD (Segregation Distorter) system in Drosophila melanogaster can sometimes be reversed, but this was found only with rather weak distorters and the effect was not large. The present study reports large negative segregation distortion in a strong distorter, SD-72 chromosome. In the presence of a specific X chromosome, su...
متن کاملOn the Models of Segregation Distortion in DROSOPHILA MELANOGASTER.
The Segregation Distorter system of Drosophila melanogaster consists of two major elements, Sd and Rsp. There are two allelic alternatives of Rsp-sensitive (Rsp(s)) and insensitive (Rsp(i)); a chromosome carrying Rsp(i) is not distorted. According to the model proposed by Hartl (1973), these two elements interact to cause segregation distortion. For a sperm to complete the maturation process, i...
متن کاملOn the components of segregation distortion in Drosophila melanogaster.
The segregation distorter (SD) complex is a naturally occurring meiotic drive system with the property that males heterozygous for an SD-bearing chromosome 2 and an SD(+)-bearing homolog transmit the SD-bearing chromosome almost exclusively. This distorted segregation is the consequence of an induced dysfunction of those sperm that receive the SD(+) homolog. From previous studies, two loci have...
متن کاملA Modified Model of Segregation Distortion in DROSOPHILA MELANOGASTER.
Elements of the Segregation Distorter (SD) system of Drosophila melanogaster, Sd and Rsp, were analyzed and the following points were established: (1) The model of multiple alleles at the Rsp(s) locus proposed by Martin and Hiraizumi (1979) is supported by our observations. (2) A modifier of SD, tentatively symbolized M(SD), was found close to cn (2R-57.5). (3) Sd heterozygous males were found ...
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Homeothermal animals, such as mammals, maintain their body temperature by heat generation and heat dissipation, while poikilothermal animals, such as insects, accomplish it by relocating to an environment of their favored temperature. Catecholamines are known to regulate thermogenesis and metabolic rate in mammals, but their roles in other animals are poorly understood. The fruit fly, Drosophil...
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ژورنال
عنوان ژورنال: Genetics
سال: 1968
ISSN: 1943-2631
DOI: 10.1093/genetics/58.3.399