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…