polyploidy. 1  the condition in which a normally diploid cell or organism acquires one or more additional sets of chromosomes. 2  Ploidy, the concept of the number of complete sets of genes organized into chromosomes, is inapplicable to prokaryotes. ... 3 from it in essence.
Healthcare providers consider a normal blood pressure reading to be 120/80 or below. However, it can actually fall anywhere in a range from 90/60 to 120/80 -- it's not just one set number. The number on top of the reading is called the systolic pressure.
You most often will see blood pressure numbers written with the systolic number above or before the diastolic number, such as 120/80 mmHg. (The mmHg is millimeters of mercuryâthe units used to measure blood pressure.) Normal blood pressure in adults is lower than 120/80 mmHg.