Atherosclerosis is the narrowing of the artery because of plaque buildup. Arteriosclerosis is the stiffening or hardening of artery walls.
Assuming type a would be an AA allele and type b is a BB allele, No because an AA mother with an AB father wont make a BB child.
A measure of tactile acuity defined as the smallest separation at which two points applied simultaneously to the skin can be clearly distinguished from a single point. It varies from 1 or 2 millimetres in the finger pads and tongue to more than 60 millimetres on the upper arm, upper thigh, and back.