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Chromosomal Rearrangements: Deletions definitions

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  • Chromosomal Rearrangement
    Structural alteration of a chromosome, often involving loss, duplication, or reorganization of segments.
  • Double-Stranded Break
    Disruption of both DNA strands, often initiating removal of a chromosome segment.
  • Centromere
    Chromosomal region essential for spindle attachment and proper segregation during cell division.
  • Enterogenic Deletion
    Loss of DNA sequence within a single gene, typically abolishing its function.
  • Multigenic Deletion
    Removal of a chromosomal segment containing multiple genes, impacting several genetic functions.
  • Terminal Deletion
    Loss of the end portion of a chromosome, including all genes distal to the break.
  • Intercalary Deletion
    Elimination of an internal chromosome segment, leaving terminal regions intact.
  • Pseudodominance
    Phenomenon where a recessive allele expresses its trait due to absence of a dominant allele from deletion.
  • Deletion Loop
    Meiotic structure formed when a normal homolog pairs with a chromosome missing a segment.
  • Meiosis
    Cell division process generating gametes, where proper chromosome pairing and segregation are crucial.
  • Cri du Chat Syndrome
    Genetic disorder from chromosome 5 deletion, causing infants to produce a cat-like cry.
  • Phenotype
    Observable trait or characteristic resulting from genetic makeup and environmental influence.
  • Homolog
    One of a pair of chromosomes carrying the same genes, inherited from each parent.
  • Cell Division
    Biological process where a parent cell splits, distributing genetic material to daughter cells.