When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Chromosomal inversion - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_inversion

    An inversion is a chromosome rearrangement in which a segment of a chromosome becomes inverted within its original position. An inversion occurs when a chromosome undergoes a two breaks within the chromosomal arm, and the segment between the two breaks inserts itself in the opposite direction in the same chromosome arm.

  3. Structural variation in the human genome - Wikipedia

    en.wikipedia.org/wiki/Structural_variation_in...

    The products of this mechanism from the sequence repeats is depicted in Figure 2. A study was done on the olfactory receptor gene clusters where they questioned if there was an association between normal rearrangement of 8p and the repeated inverted sequences. The researchers observed that the rearrangement of chromosomes was actually caused by ...

  4. Position-effect variegation - Wikipedia

    en.wikipedia.org/wiki/Position-effect_variegation

    The classical example is the Drosophila w m4 (speak white-mottled-4) translocation.In this mutation, an inversion on the X chromosome placed the white gene next to pericentric heterochromatin, or a sequence of repeats that becomes heterochromatic. [3]

  5. Chromosomal rearrangement - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_rearrangement

    In genetics, a chromosomal rearrangement is a mutation that is a type of chromosome abnormality involving a change in the structure of the native chromosome. [1] Such changes may involve several different classes of events, like deletions, duplications, inversions, and translocations.

  6. Position effect - Wikipedia

    en.wikipedia.org/wiki/Position_effect

    Position effect is the effect on the expression of a gene when its location in a chromosome is changed, often by translocation. This has been well described in Drosophila with respect to eye color and is known as position effect variegation (PEV). [1] The phenotype is well characterised by unstable expression of a gene that results in the red ...

  7. Gene conversion - Wikipedia

    en.wikipedia.org/wiki/Gene_conversion

    Biased gene conversion (BGC) occurs when one allele has a higher probability of being the donor than the other in a gene conversion event. For example, when a T:G mismatch occurs, it would be more or less likely to be corrected to a C:G pair than a T:A pair. This gives that allele a higher probability of transmission to the next generation.

  8. Inverted repeat - Wikipedia

    en.wikipedia.org/wiki/Inverted_repeat

    The antithrombin III gene's coding region is an example of an imperfect inverted repeat as shown in the figure on the right. The stem-loop structure forms with a bump at the bottom because the G and T do not pair up. A strand switch event could result in the G (in the bump) being replaced by an A which removes the "imperfection" in the inverted ...

  9. Inversion (evolutionary biology) - Wikipedia

    en.wikipedia.org/wiki/Inversion_(evolutionary...

    Balanoglossus, an example of a Hemichordata, represents an "evolutionary link" between invertebrates and vertebrates. In addition to the simple observation that the dorsoventral axes of protostomes and chordates appear to be inverted with respect to each other, molecular biology provides some support for the inversion hypothesis.