Human+Chromosomes-Faith

__**Human Chromosome Questions**__
nondisjunction trisomy monosomy Barr body Down Syndrome Turner Syndrome Klinefelter Syndrome Poly-X Females Jacobs Syndrome
 * failure of homologous chromosomes or daughter chromosomes to separate during meiosis I and meiosis II respectively
 * one more chromosome than usual
 * one less chromosome than usual
 * dark staining body in the nuclei of female mammals that contains a condensed inactive X chromosome
 * usually have three copies of chromosomes 21 because the egg had 2 copies instead of one
 * individual has only one sex chromosome an X
 * a male born with two X chromosomes and one Y chromosomes
 * have more than two X chromosomes and extra Barr bodies in the nucleus
 * Female with three X chromosomes have no distinctive phenotype aside from a tendency to be tall and thin
 * XYY males can only result from non disjuction during spermatogenesis

What are the two types of chromosomes and how many of each do we have in every cell? Describe process that can change the normal number of chromosomes in a cell? Name chromosome disorders due to an abnormal number of autosomal chromosomes. Name chromosome disorders due to an abnormal number of sex chromosomes. deletion duplication inversion translocation
 * 22 pairs of autosomes
 * 2 sex chromosomes
 * down syndrome
 * turner syndrome
 * klinefelter syndrome
 * Poly-X femals
 * Jacobs syndrome
 * changes in chromosome structure in which the end of a chromosom breaks off or two simultaneous breaks lead to the loss of an internal segment often causes abnormalities
 * change in chromosome structure in which a particular segment is present more than once in the same chromosome
 * change in chromosome structure in which a segment a segment of chromosome is turned around 180 degrees, this reversed sequence of genes can lead to altered gene activity and abnormalities
 * movement of a chromosomal segment from one chromosome to another nonhomologous chromosome leading to abnormalities (down syndrome)

Williams syndrome
 * occurs when chromosome 7 loses a tin end piece

Crit du Chat syndrome Alagille sydnrome Chronic myelogenous leukemia Burkett lymphoma Name chromosome deletion syndromes. Name chromosome translocation syndromes.
 * a missing portion of chromosome 5
 * have a deletion of chromosome 20
 * is a translocation from a portion of chromosome 22 to chromosome 9
 * when cells show a reciprocal translocation between the long arm of chromosome 8 and chromosome 14, 2, or 22
 * williams
 * Alagille
 * cri du chat
 * chronic myelogenous leukemia
 * Burkett lymphoma