Evidence that the segregation-distortion phenomenon in Drosophila involves chromosome breakage.
نویسندگان
چکیده
منابع مشابه
Segregation distortion in hybrids between the Bogota and USA subspecies of Drosophila pseudoobscura.
We show that, contrary to claims in the literature, "sterile" males resulting from the cross of the Bogota and USA subspecies of Drosophila pseudoobscura are weakly fertile. Surprisingly, these hybrid males produce almost all daughters when crossed to females of any genotype (pure Bogota, pure USA, hybrid F1). Several lines of evidence suggest that this sex ratio distortion is caused by sex chr...
متن کاملSegregation distortion and crossing over in males of Drosophila ananassae. I. Preliminary genetic analysis.
ANDLER and NOVITSKI (1957) proposed the term “meiotic drive” (or segregation distortion) to describe a condition which leads to unequal segregation of the two alleles present in a heterozygote in consequence of certain aberrant mechanisms during meiosis. SANDLER, HIRAXZUMI and SANDLER (1959) and SANDLER and HIRAIZUMI (1959, 1960) have made a detailed analysis of this segregation distortion phen...
متن کاملMeiotic Drive in Natural Populations of Drosophila Distortion: a Possible Nonallelic
ALES, heterozygous for the Segregation-distorter (SO) allele (located in or near the centromeric heterochromatin of the right arm of chromosome 11) and a standard tester second chromosome, regularly produce a preponderance of functional SD-bearing sperm ( SANDLER, HIRAIZUMI and SANDLER 1959). Segregation in heterozygous SD females, on the other hand, is always normal. It has been found, however...
متن کاملA role for Drosophila SMC4 in the resolution of sister chromatids in mitosis
BACKGROUND Faithful segregation of the genome during mitosis requires interphase chromatin to be condensed into well-defined chromosomes. Chromosome condensation involves a multiprotein complex known as condensin that associates with chromatin early in prophase. Until now, genetic analysis of SMC subunits of the condensin complex in higher eukaryotic cells has not been performed, and consequent...
متن کاملGenetic Architechture of Male Sterility and Segregation Distortion in Drosophila Pseudoobscura Bogota-usa Hybrids
Running title: Genetics of speciation in Drosophila pseudoobscura. ABSTRACT Understanding the genetic basis of reproductive isolation between recently diverged species is a central problem in evolutionary genetics. Here, I present analyses of the genetic architecture underlying hybrid male sterility and segregation distortion between the Bogota and USA subspecies of D. pseudoobscura. Previously...
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ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 48 شماره
صفحات -
تاریخ انتشار 1962