enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Chromosomal crossover - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_crossover

    The linked frequency of crossing over between two gene loci is the crossing-over value. For fixed set of genetic and environmental conditions, recombination in a particular region of a linkage structure tends to be constant and the same is then true for the crossing-over value which is used in the production of genetic maps.

  3. Meiosis - Wikipedia

    en.wikipedia.org/wiki/Meiosis

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 December 2024. Cell division producing haploid gametes For the figure of speech, see Meiosis (figure of speech). For the process whereby cell nuclei divide to produce two copies of themselves, see Mitosis. For excessive constriction of the pupils, see Miosis. For the parasitic infestation, see Myiasis ...

  4. Genetic recombination - Wikipedia

    en.wikipedia.org/wiki/Genetic_recombination

    Thomas Hunt Morgan's illustration of crossing over (1916) In eukaryotes, recombination during meiosis is facilitated by chromosomal crossover. The crossover process leads to offspring having different combinations of genes from those of their parents, and can occasionally produce new chimeric alleles.

  5. Heteroduplex - Wikipedia

    en.wikipedia.org/wiki/Heteroduplex

    In meiosis, the process of crossing-over occurs between non-sister chromatids, which results in new allelic combinations in the gametes. In crossing-over, a Spo11 enzyme makes staggered nicks in a pair of sister chromatid strands (in a tetrad organization of prophase). Subsequent enzymes trim back the 5' ends of the strand and a protein complex ...

  6. Homologous chromosome - Wikipedia

    en.wikipedia.org/wiki/Homologous_chromosome

    The process of meiosis I is generally longer than meiosis II because it takes more time for the chromatin to replicate and for the homologous chromosomes to be properly oriented and segregated by the processes of pairing and synapsis in meiosis I. [7] During meiosis, genetic recombination (by random segregation) and crossing over produces ...

  7. Cell division - Wikipedia

    en.wikipedia.org/wiki/Cell_division

    Interphase is the process through which a cell must go before mitosis, meiosis, and cytokinesis. [15] Interphase consists of three main phases: G 1, S, and G 2. G 1 is a time of growth for the cell where specialized cellular functions occur in order to prepare the cell for DNA replication. [16]

  8. A woman bypassed multiple security checkpoints to get on a ...

    www.aol.com/woman-bypassed-multiple-security...

    Investigators are trying to determine how a woman got past multiple security checkpoints this week at New York’s JFK International Airport and boarded a plane to Paris, apparently hiding in the ...

  9. Chiasma (genetics) - Wikipedia

    en.wikipedia.org/wiki/Chiasma_(genetics)

    Points of crossing over become visible as chiasma after the synaptonemal complex dissembles and the homologous chromosomes slightly apart from each other. The phenomenon of genetic chiasmata ( chiasmatypie ) was discovered and described in 1909 by Frans Alfons Janssens , a Professor at the University of Leuven in Belgium .