By Mayo Clinic Staff. An intravenous pyelogram (PIE-uh-low-gram), also called an excretory urogram, is an X-ray exam of your urinary tract. An intravenous pyelogram lets your doctor view your kidneys, your bladder and the tubes that carry urine from your kidneys to your bladder (ureters).
The silver, silver dapple, chocolate flax or Taffy gene. Silver, or silver dapple is the common term used for horses with a dilution gene that works to dilute black pigment. The gene usually causes a partial lightening of black pigment in the body coat and a more extreme lightening (or âsilveringâ) of the mane and tail.
What is a 'Silver Dapple' horse color? The color silver dapple or silver black is caused by the silver gene. This gene only acts on bay- or black-based horses, and does not affect chestnut pigment. It lightens â¦the mane and tail, and often causes faint dapples.