Meiotic drive mechanisms: lessons from Drosophila
نویسندگان
چکیده
منابع مشابه
Meiotic Drive in Natural Populations of Drosophila
EIOTIC drive has been defined as a force, potentially capable of altering M gene frequencies in natural populations, which somehow depends upon the nature of the meiotic divisions; specifically, when the meiotic divisions are such that the two kinds of gametes from a heterozygote are produced in a ratio different from 1 : 1 ( SANDLER and NOVITSKI 195 7). There have been reported numerous cases ...
متن کاملSex Chromosome Meiotic Drive in DROSOPHILA MELANOGASTER Males.
In Drosophila melanogaster males, deficiency for X heterochromatin causes high X-Y nondisjunction and skewed sex chromosome segregation ratios (meiotic drive). Y and XY classes are recovered poorly because of sperm dysfunction. In this study it was found that X heterochromatic deficiencies disrupt recovery not only of the Y chromosome but also of the X and autosomes, that both heterochromatic a...
متن کاملMultiple meiotic drive systems in the Drosophila melanogaster male.
The behaviour of two "meiotic drive" systems, Segregation-Distorter (SD) and the sex chromosome sc(4)sc(8) has been examined in the same meiocyte. It has been found that the two systems interact in a specific way. When the distorting effects of SD and sc(4)sc(8) are against each other, there is no detectable interaction. Each system is apparently oblivious to the presence of the other, gametes ...
متن کاملDoes Stellate cause meiotic drive in Drosophila melanogaster?
Drosophila melanogaster males deficient for the crystal (cry) locus of the Y chromosome that carry between 15 and 60 copies of the X-linked Stellate (Ste) gene are semisterile, have elevated levels of nondisjunction, produce distorted sperm genotype ratios (meiotic drive), and evince hyperactive transcription of Ste in the testes. Ste seems to be the active element in this system, and it has be...
متن کاملMeiotic drive and visible polarity in Drosophila spermatocytes.
HE model for meiotic drive presented by PEACOCK and ERICKSON (1965) Tdemands that an intracellular differentiation exists at the time of the first meiotic division in spermatocytes. As a result of this differentiation, one of the spindle poles at anaphase I will lead to the formation of two functional sperm, while the other pole will yield two nonfunctional sperm. This model can be used to expl...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2019
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2019.1430