meiotic drive


Also found in: Encyclopedia.

mei·ot·ic drive

differential fitness in males and females.

meiotic drive

a mechanical phenomenon during MEIOSIS that results in the two types of gametes produced by a heterozygote occurring in unequal numbers. Meiotic drive can have an important impact when it produces unequal sex ratios, and has been used in attempts at insect control by producing excess males and few females.
References in periodicals archive ?
Low frequency of mouse t haplotypes in wild populations is not explained by modifiers of meiotic drive.
Cheaters sometimes prosper: distortion of Mendelian segregation by meiotic drive.
551) argue more recently that in many cases of meiotic drive, there is selection at two levels.
Control of meiotic drive of B chromosomes in the mealy bug Pseudococcus affinis (obscurus).
Sex-ratio drive is a particular case of meiotic drive, where the driving factor(s) are located on a sex chromosome.
However, for loci that exhibit strong epistatic interactions, such as those involved in sex-ratio meiotic drive and its suppression (Jaenike 1996), current levels of gene flow in D.
More recently, analysis of the "sex-ratio" meiotic drive system in natural populations of D.
I examined the evolution of SR polymorphism for discrete and overlapping generations, in the absence of selection and with complete meiotic drive in males.
We discuss one possible cause - environment-specific meiotic drive (that is, environment-specific selection among developing gametes or gametophytes) that to our knowledge has not been recognized as a source of variation among pollen donors.
I found this overly pessimistic; analytical or simulation studies must make assumptions about such things as selection, drift, gene flow, and meiotic drive, and these then permit modeling of demographic or genetic parameters that show conditions under which strongly underdominant rearrangements may be fixed, spread, and contribute to postmating isolation.
One recently proposed evolutionary explanation posits that both Haldane's rule and large sex-chromosome effects results from genes that cause meiotic drive (Frank, 1991a; Hurst and Pomiankowski, 1991).