Why does the second generation, in sexually reproducing organisms, exhibit differences inherited from the first generation along with newly created differences?

The second generation in sexually reproducing organisms exhibits differences inherited from the first generation along with newly created differences due to the processes of meiosis and genetic recombination. During meiosis, genetic material is shuffled and recombined, resulting in new combinations of genes. Additionally, mutations, which introduce novel genetic variations, may occur. The combination of these factors leads to offspring inheriting a unique set of genes, a mix of traits from both parents, and occasional new variations. This genetic diversity ensures adaptability, evolution, and the potential for better survival in changing environments over successive generations.