REGULATION OF MEIOTIC CHROMOSOME SEGREGATION AND RECOMBINATION IN SEXUALLY REPRODUCING ORGANISMS

Abstract

Background: Meiosis is a specialized cell division that is essential to sexual reproduction, and to achieve proper segregation of chromosomes and encourages genetic diversity by recombination. Abnormal meiotic division may result in aneuploidy and infertility and cause genetic diseases.

Objective: This paper will explore the cellular processes that regulate meiotic chromosome segregation and recombination that control the fundamental molecular activities of cohesins, proteins of the synaptonemal complex and recombinases.

Methodology: A mixed experimental and literature-based methodology, including comparative study of wild-type systems and mutant systems in models was utilized. The evaluation of meiotic progression and chromosomal behavior was carried out using techniques like fluorescence microscopy, gene expression profiling and recombination frequency analysis. ANOVA with the level of significance at p < 0.05 was used to perform statistical analysis.

Findings: It was found that the segregation of the chromosomes in wild-type cells was around 92 percent and in the mutant systems around 25 percent error rates were observed. The recombination frequency dropped by half in normal cells (85 percent equal), and dropped close to 60 percent in defective endowment. Breakage in cohesin action and recombination apparatus had a big effect on the stability of chromosomes.

Conclusion: Meiotic chromosome segregation and recombination has to be properly regulated to be able to get genomic stability and reproductive success. These results give interesting information about the molecular nature of meiosis and the possibilities that can be used to deal with infertility and genetic defects.