Polygenic inheritance can be explained as Mendelian inheritance at many loci, resulting in a trait which is normally-distributed. If n is the number of involved loci, then the coefficients of the binomial expansion of (a + b) 2n will give the frequency of distribution of all n allele combinations.
Once the pacemaker is implanted, the leads carry signals back from the heart. The pulse generator reads these signals and the batteries send electrical impulses to the heart to help pace it. Most pacemakers can sense the heart's rhythm and turn themselves off when the heartbeat is above a certain level. They will turn on again when the heartbeat is too slow. These types of pacemakers are called demand pacemakers.
Join Date: Sep 2012. Posts: 5. Unless the bottom number is being cut off, that is what is showing--when the power came back on, it automatically turned on and the only way I could turn it off was at the breaker. So when I turned it back on a couple days later to cook, it turns on, but will not heat.