WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
Nature The World Movies USA Top Art Fine & Rare History Ivy & Inquiry
Chromosome segregation
Videos
Chromosome segregation is the process in eukaryotes by which two sister chromatids formed as a consequence of DNA replication, or paired homologous chromosomes, separate from each other and migrate to
A diagram of the meiotic phases
A diagram of the meiotic phases
A current model of meiotic recombination, initiated by a double-strand break or gap, followed by pairing with an homologous chromosome and strand inva
A current model of meiotic recombination, initiated by a double-strand break or gap, followed by pairing with an homologous chromosome and strand invasion to initiate the recombinational repair process. Repair of the gap can lead to crossover (CO) or non-crossover (NCO) of the flanking regions. CO recombination is thought to occur by the Double Holliday Junction (DHJ) model, illustrated on the right, above. NCO recombinants are thought to occur primarily by the Synthesis Dependent Strand Annealing (SDSA) model, illustrated on the left, above. Most recombination events appear to be the SDSA type.
Meiosis
Videos
Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes: the sperm or egg cells. It involves two rounds of division that ultimately result
Chromosome segregation
…homologous chromosomes, separate from each other and migrate to opposite poles of the nucleus. This segregation process occurs during both mitosis and meiosis. Chromosome segregation also occurs in prokaryotes. However, in contrast to eukaryotic chromosome segregation, replication and segregation are not…
A diagram depicting nondisjunction in the maternal cell during the Meiosis I phase, resulting in gametes with an extra chromosome. Through fertilizati
A diagram depicting nondisjunction in the maternal cell during the Meiosis I phase, resulting in gametes with an extra chromosome. Through fertilization of this egg, an offspring with the condition trisomy 21 is produced.