| 1 | There are obvious difference on morphology and cytology between polypoid and diploid . | |
| 2 | Only a small, sequestered breeding stock is allowed to remain diploid. | |
| 3 | The development of embryos from diploid somatic cells in embryo culture. | |
| 4 | The diploid condition is restored when the nuclei of two gametes fuse to give the zygote. | |
| 5 | Zygote The diploid cell resulting from the fusion of two haploid gametes. A zygote usually undergoes mitosis immediately. See sexual reproduction. |