An important gene has a mutation rate of 0.0004 mutations per generation. Find the expected number of

Question:

An important gene has a mutation rate of 0.0004 mutations per generation. Find the expected number of mutations, the variance, the probability of zero mutations, and the probability of exactly one mutation in a period of 2000 generations.
Genes in different organisms have different rates of mutation. Compute the above values and probabilities.