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.
For a normal reading, your blood pressure needs to show a top number (systolic pressure) thatâs between 90 and 120 and a bottom number (diastolic pressure) thatâs between 60 and 80. The American Heart Association (AHA) considers blood pressure to be within the normal range when both your systolic and diastolic numbers are in these ranges.