Which of the following statements describes the chromosome theory of inheritance as expressed in the early twentieth century? A) No more than a single pair of chromosomes can be found in a healthy normal cell. B) Individuals inherit particular chromosomes attached to genes. C) Mendelian genes are at specific loci on the chromosome and in turn segregate during meiosis. D) Homologous chromosomes give rise to some genes and crossover chromosomes to other genes. E) Natural selection acts on certain chromosome arrays rather than on genes.