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.
Blood pressure of less than 140 (systolic) over 90 (diastolic) is considered a normal reading for adults, according to the AHA, while a reading equal to or greater than 140 over 90 is considered elevated (high). A systolic pressure of 130 to 139 or a diastolic pressure of 85 to 89 needs to be watched carefully.