| Column-I | Column-II | ||
| A. | Homozygous | P. | having two different alleles of a particular gene or genes |
| B. | Heterozygous | Q. | having two identical alleles of a particular gene or genes |
| C. | Homologous | R. | not having the same alleles or genes in the same order of arrangement |
| D. | Heterologous | S. | having the same alleles or genes in the same order of arrangement |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | S | R | Q | P |
| 3. | Q | P | S | R |
| 4. | P | Q | S | R |