sister chromatid exchange
41Isochromosome — An isochromosome is a chromosome that has lost one of its arms and replaced it with an exact copy of the other arm[1]. This is sometimes seen in some females with Turner syndrome or in tumor cells. This may also cause an isochromosome to have two …
42Origin and function of meiosis — Eukaryotes are organisms with a true nucleus in which the DNA genome is enclosed in a double membrane (e.g. fungi, protozoans, vertebrates, higher plants), in contrast to prokaryotes (bacteria and blue green algae) that lack a nuclear membrane.… …
43Homologous chromosome — Homologous chromosomes are chromosomes in a biological cell that pair (synapse) during meiosis, or alternatively, non identical chromosomes that contain information for the same biological features and contain the same genes at the same loci but… …
44Proliferating cell nuclear antigen — The assembled human DNA clamp, a trimer of the protein PCNA …
45Postreplication repair — is the repair of damage to the DNA that takes place after replication. Some example genes in humans include: BRCA2 and BRCA1 BLM NBS1 DNA damage prevents the normal enzymatic synthesis of DNA by the replication fork.[1][2][3][4] …
46meiosis — meiotic /muy ot ik/, adj. /muy oh sis/, n. 1. Cell Biol. part of the process of gamete formation, consisting of chromosome conjugation and two cell divisions, in the course of which the diploid chromosome number becomes reduced to the haploid. Cf …
