Jacobsen Syndrome, Which Can Cause Heart Defects, Intellectual Deficiencies, and Bleeding

Multiple Choice

Jacobsen syndrome, which can cause heart defects, intellectual deficiencies, and bleeding disorders, is caused by a deletion of the terminal end of chromosome 11. What method could you use to determine whether an individual has Jacobsen syndrome?

A) Look at a person's skin cells in G1 under a light microscope.
B) Perform a karyotype using a person's white blood cells.
C) Place a person's red blood cells in culture to see if they grow.
D) Count the number of chromosomes present.