Why an offspring of a human being is not a true copy of his parents in sexual reproduction?

Question :Why an offspring of a human being is not a true copy of his parents in sexual reproduction?

The correct answer is -In sexual reproduction, the offspring of a human being is not a true copy of its parents because it inherits half of its genetic material from each parent. During the formation of gametes (sperm and egg cells), the genetic material undergoes a process of recombination known as crossing over. This leads to the shuffling and mixing of genetic material from both parents, resulting in offspring that has a unique combination of genes. Additionally, random fertilization also contributes to the genetic variation among offspring. Hence, even though offspring inherit certain traits from their parents, they are not exact copies of them.