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.
An average reading of 120/80 or below is considered a normal blood pressure for adults. However, normal blood pressure can vary from person to person based on factors such as overall health and family history. To determine if your blood pressure is normal, have multiple readings taken on different days.