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.
1 Normal blood pressure readings are below 120/80 mm Hg. 2  High blood pressure (hypertension) is generally considered to be a blood pressure reading greater than or equal to 140 mm Hg (systolic) or greater than or equal to 90 mm Hg (diastolic).octors may also categorize hypertension based on what portion of the blood pressure reading is abnormal: 1  Isolated systolic hypertension occurs when systolic pressure is high (over 139 mm Hg) but diastolic pressure is normal (under 90 mm Hg).