How is the problem of dobling of the amount of DNA solved ?

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The problem of dobling of the DNA is solved by having special cell lineages for reproduction. Multicellular cells have specialised cells called germ-cells which have only half the number of chromosomes and half the amount of DNA as compared to the nonreproductive body cells. Thus, when these germ-cells from two individuals combine during sexual reproduction to form a new individual, it results in re-establishment of the number of chromosomes and the DNA content in the new generation without doubling it..