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.
In horses random white spotting, or deletion of color, has been determined to be caused by more than half a dozen known genetic factors. In more than 25 different dog breeds, a mutation found in a gene called Microphthalmia Associated Transcription Factor-(MITF) is associated with a piebald spotting.