The correct option is D Separation of characters of both parents together
The Principle of Independent Assortment states that two or more characters are inherited when the responsible gene separate independently from one another when reproductive cells develop. During meiosis, the pairs of homologous chromosome divide in half and form the haploid cell. This separation of chromosomes is random. After meiosis, each haploid cell of the offspring contain mixture of genes from the organism's mother and the father.