Definition: this is one result of gamete formation through meiosis and fertilization during sexual reproduction that promotes biodiversity within a species.

The correct answer is genetic variation.
Genetic variation describes genetic differences (difference in DNA sequences) among individuals of the same species. Some of the factors that contribute to genetic variation include
·     Mutations- changes in DNA sequence
·     Recombination(crossing over)- exchange of the genetic material between maternal and paternal DNA which occurs during meiosis and creates new combinations of variants.
·     Genetic drift-the process of change in the genetic composition of a population as a result of random events.

Yes he thought they should be left to chance why, because he thought that was the best thing to do