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Unformatted text preview: several times Deletion: -Another reason chromosomes structure may be affected is through deletions -THis is when parts of the chromosome are deleted Inversion: -Another reason chromosome structure may be affected is through Inversion -HTis is when parts of the chromosome are switched Translocation: Another reason chromosome structure may be affected is through Translocation -This is when non-homologous chromosomes recombine Changes in number: -CHromosomes normally separate during Meiosis -If they do not, it is called nondisjunction and results in aneuploidy -Monosomic (those who lack a chromosome) do not survive development -Most trisomics (those who have an extra chromosome) also do not survive development ->Also called polyploidy ->Some survive, but have developmental defects -If aneuploidy occurs with sex chromosomes, the abnomalities are generally not fatal -There are several manifestations of this nondisjunction Page 1...
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- Fall '07
- Physiology, Fragile X syndrome, chromosome structure, Chromosomes Sex Determination, aneuploidy -Monosomic