meiosis (maɪˈəʊsɪs) n,pl-ses(-ˌsiːz) 1.(Biology) a type of cell division in which a nucleus divides into four daughter nuclei, each containing half the chromosome number of the parent nucleus: occurs in all sexually reproducing organisms in which haploid gametes or spor...
During prophase I of meiosis I, a process called recombination can occur. This process is used to create variation and is absent in the process of mitosis. The process of meiosis is something that only occurs in organisms that reproduce sexually. Mitosis occurs in all types of organisms. ...
Traditionally, sex has been seen as advantageous due to the effects of recombination during meiosis, a process which generates genetic variance in the offspring. Genetic variation can provide an adaptive benefit in changing environments [13-14]. Further, recombination exposes deleterious mutations to pu...
During meiosis the number of chromosomes must be halved in the daughter cells, and to do this properly, most organisms use an amazing strategy: during the first of the two meiotic divisions, homologous chromosomes associate in pairs, undergo a reciprocal genetic interchange, and then each member ...
Why is the process of mitosis and meiosis both important to living organism? What is the significance of meiosis in terms of the genetic makeup of the whole species? What is the difference between mitosis and meiosis in relation to cell division?
Over the past decade, molecular regulators of the mitosis/meiosis decision have been discovered in most of the major model multicellular organisms. Historically, the mitosis/meiosis decision has been closely linked with controls of germline self-renewal and the sperm/egg decision, especially in ...
Although this association extends to many other organisms, the factors that influence the number and placement of exchanges within a cell remain poorly understood. Like other aspects of meiosis, the control of recombination is likely to be subject to variation among species. In this review we ...
cell division,cellular division- the process in reproduction and growth by which a cell divides to form daughter cells crossing over,crossover- the interchange of sections between pairing homologous chromosomes during the prophase of meiosis defoliation- the loss of foliage ...
While the question of why organisms reproduce sexually is still a matter of controversy, it is clear that the foundation of sexual reproduction is the formation of gametes with half the genomic DNA content of a somatic cell. This reduction in genomic content is accomplished through meiosis that,...
Sexually reproducing eukaryotes use recombination between homologous chromosomes to promote chromosome segregation during meiosis. Meiotic recombination is almost universally conserved in its broad strokes, but specific molecular details often differ con