A:the chromosomes as well as genes occur in pair
R:the two alleles of a gene pair are located on non-homologous sites on homologous chromosome.
A:the chromosomes as well as genes occur in pair
R:the two alleles of a gene pair are located on non-homologous sites on homologous chromosome.
R:the two alleles of a gene pair are located on non-homologous sites on homologous chromosome.