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Karyotyping
What is a Karyotype?
A  set of chromosomes.
 46 chromosomes in a human
  karyotype (23 pairs).
Amniocentesis
 Method  for
  obtaining fetal
  cells.
 Chromosomes
  can be obtained
  from cells.
When Should Amniocentesis
Be Done?
    This is a “risky” procedure.
    Should be performed on women
     who:
    a) Are in their mid 30’s or older.
    b) Have had a previous child with
       a chromosomal defect.
Chromosome Spread
Karyotype
Patient Name:
What can be determined
from looking at a karyotype?
1.    Sex of the individual.
2.    Chromosomal mutations (abberations)
     a) Monosomy
     b) Trisomy
     c) Deletions
     ***Depending which chromosome has the
        mutation, this determines the disorder…

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Karyotyping

  • 2. What is a Karyotype? A set of chromosomes.  46 chromosomes in a human karyotype (23 pairs).
  • 3. Amniocentesis  Method for obtaining fetal cells.  Chromosomes can be obtained from cells.
  • 4. When Should Amniocentesis Be Done?  This is a “risky” procedure.  Should be performed on women who: a) Are in their mid 30’s or older. b) Have had a previous child with a chromosomal defect.
  • 8. What can be determined from looking at a karyotype? 1. Sex of the individual. 2. Chromosomal mutations (abberations) a) Monosomy b) Trisomy c) Deletions ***Depending which chromosome has the mutation, this determines the disorder…