Meiotic Recombination
Meiotic Recombination - Related Videos
06:38
Preparation of Meiotic Chromosome Spreads from Mouse Spermatocytes
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Cited by 27 •
2017
Meiosis is the developmental process by which gametes are formed through a single round of DNA replication and two successive rounds of chromosome segregation. Mammalian meiosis can be examined by utilizing a technique to prepare meiotic chromosome spreads. Here, we demonstrate a method of preparing surface-spread nuclei from mouse spermatocytes.
07:18
Live Imaging Characterization of Centromere Movements During Male Meiotic Prophase in Arabidopsis thaliana
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2025
Chromosome movement during meiotic prophase is a poorly understood phenomenon that is fundamental to spore formation. This protocol describes a method to acquire, analyze, and quantify centromere movements during meiotic prophase in Arabidopsis thaliana male meiocytes.
09:24
Preparation of Meiotic Chromosome Spreads from Mouse Oocytes for Assessment of Synapsis and Recombination
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Cited by 4 •
2025
Figure 1: End-to-end framework. The figure illustrates end-to-end framework for multimodal knowledge Graph VISHAM-KG. Please click here to view a larger version of this figure.
14:23
Recombineering Homologous Recombination Constructs in Drosophila
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Cited by 9 •
2013
Homologous recombination techniques greatly advance Drosophila genetics by enabling the creation of molecularly precise mutations. The recent adoption of recombineering allows one to manipulate large pieces of DNA and transform them into Drosophila6. The methods presented here combine these techniques to rapidly generate large homologous recombination vectors.
10:43
Flow Cytometry Purification of Mouse Meiotic Cells
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Cited by 65 •
2011
An efficient method to obtain highly purified viable meiotic fractions from mouse testis is described, which combines a refined cell dissociation protocol with fluorescent activated cell sorting (FACS). This method takes advantage of differences in the DNA content and nuclear density of discrete meiotic fractions.
FAQs
Programmed DNA double-strand breaks create starting points for repair during prophase I. The broken DNA is repaired by using the homologous chromosome as a matching template, allowing corresponding genetic regions to interact. This template-directed repair links DNA damage control with chromosome pairing and helps generate the crossover structures needed for later chromosome behavior.
Crossover structures provide physical connections between homologous chromosomes after repair has occurred. These connections help keep homologs associated until they separate during meiosis. Consequently, recombination contributes not only to genetic reshuffling but also to the orderly distribution of homologous chromosomes into gametes, making its chromosome-level role distinct from variation alone.
When homologous chromosomes exchange repaired DNA segments, alleles inherited from different parents can be combined into new chromosomal arrangements. Gametes therefore may carry allele combinations that differ from either parental chromosome. This reshuffling increases genetic variation and supplies material relevant to the inheritance of traits and the diversity observed within populations.
Crossover frequency provides a way to examine how often exchange events occur across meiotic chromosomes. Comparing these frequencies can help researchers investigate patterns of chromosome behavior and allele reshuffling. Such information is useful for connecting the occurrence of recombination with inheritance patterns, population diversity, and the mechanisms that support accurate chromosome segregation.
Researchers examine the pathways that repair programmed DNA double-strand breaks and assess whether repair produces the chromosome connections associated with crossovers. Studying these pathways clarifies how homologous chromosomes serve as templates during prophase I. The resulting evidence helps explain how DNA repair, chromosome organization, and gamete formation are linked.
Errors in recombination can disrupt chromosome behavior or segregation, which may produce gametes with abnormal chromosome numbers, a condition called aneuploidy. Investigating these errors helps researchers connect meiotic defects with infertility and genetic disease. Recombination studies therefore provide a framework for examining how failures in DNA repair or chromosome connections affect reproductive outcomes.