A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
If you were born in 1929 or later, you need to work at least 10 years to become eligible for Social Security. The SSA determines eligibility with a system of credits. Basically, you earn up to four credits for every year worked, and you need a total of 40 credits to qualify for Social Security.
In several unofficial Social Security benefit resources, the average wait time is estimated to be approximately 90 days before the first monthly SSDI check is issued. You will receive two, possibly three different checks. The first check is your monthly SSDI award. This amount is determined by the length of time you worked in the past and how much you contributed to SSA. The second check is Social Security Disability back pay. The amount that you receive in back pay is determined by the date that you became disabled (for this purpose, disability means the point at which you became unable to work enough to be considered substantial gainful work activity, or SGA, the current 2009 SGA is $980/month.