The prokaryotes are by far the most abundant organisms inhabiting planet Earth. They are also by far the most diverse.
The uniqueness of individual offspring for many animals and plants is the result of a process called Meiosis.
During meiosis , the number of chromosomes in parent cell are reduced by half and produces four gamete cells.
Later
on, these chromosomes are mixed into the new offspring, causing it
carried out some characteristic from its parents and became a new unique
individual.
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Deletion because it worse then a substitution since your deleting something
