Final answer:
The number of mutations expected in each human cell division is approximately 0.004.
Step-by-step explanation:
The human genome contains about 3 billion base pairs of DNA. Given an error rate of 1,000 to 1,000,000 molecular lesions per cell per day, we can calculate the number of mutations expected in each cell division.
Let's assume the middle point of the error rate, which is 500,000 molecular lesions per cell per day. In one day, there are approximately 24 cell divisions. So, the total number of molecular lesions in one day will be 500,000 x 24 = 12,000,000. Since there are about 3 billion base pairs in the human genome, we can calculate the number of mutations expected in each human cell division as:
Number of mutations = Total number of molecular lesions / Total number of base pairs = 12,000,000 / 3,000,000,000 = 0.004 mutations
Therefore, we would expect approximately 0.004 mutations in each human cell division.