Angioedema is caused by an allergic reaction to something you've eaten, an insect bite, pollen allergies, or a medication you've taken. 1  It causes a swelling of the lips, face, and tongue, which usually occurs rapidly. It can also sometimes be accompanied by redness or bumps (hives). Due to the swelling, you may have difficulty talking. Angioedema can also cause swelling of the airway and difficulty breathing, which may be life-threatening.
holocentric chromosome. (genetics). A chromosome with centromer; activity/spread along its entire length.1  Facebook.olocentric chromosome. (genetics). A chromosome with centromer; activity/spread along its entire length. 1  Facebook.
Types of chromosomes: Chromosomes are classified according to their shape, which is determined by the position of the centromere (the point of attachment to the mitotic spindle). 1. Metacentric: If the centromere is present near about in the middle of the chromosome, then it is called as metacentric, i.e., chromosomes have equal or almost equal arms.