What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process? How does the amount of DNA remain constant though each new generation in a combination of DNA copies of two individuals?
The not so perfect DNA copying produces variation in the reproduction process. The variation may be useful or harmful, The useful selection is selected by nature whereas, the harmful ones are discarded.
The amount of DNA remains constant because meiosis in the cells produces gametes. The gametes are a special type of cells called reproductive cells which contain only half the amount of DNA as compared to the normal body cells of an organism. The gametes combine during the process of fertilisation and restore the original chromosomal number and thus maintain a constant amount of DNA through each generation.
