Answer:
Children never look exactly identical to their parents because of the process of genetic inheritance. Each individual inherits one set of 23 chromosomes from each parent, resulting in a unique combination of genetic information. Chromosomes contain thousands of genes, which are the basic units of heredity that determine traits such as eye color, hair color, and height. Each gene can have different versions called alleles, which can lead to variations in the trait. The combination of alleles inherited from each parent determines the child's traits. Since each parent contributes a different combination of alleles, the child will inherit a unique combination that may differ from both parents. Therefore, the genetic makeup of each individual is unique, resulting in physical and behavioral differences between individuals.