Izvi zvinotendwa kuti zvinokonzerwa nezvinhu zviviri, chekutanga chiri kuratidzwa mu cat hybrids, kuti kana nhamba ye chromosome yemurume yakakwirira, kubereka kunodonha mitengo. Kuderera kweprogesterone kugadzirwa kwe jenny kunogona zvakare kutungamira mukurasikirwa kwe embryonic kwekutanga. Mukuwedzera, pane zvikonzero zvisiri zvakananga zvine chekuita nehupenyu hwekubereka. Nekuda kwekuita kwakasiyana kwekubereka, jacks Zebra anowanzo kuda kufukidza mares kupfuura stallions kubereka jennies. Zvakare, mares anowanzo kuve akakura kupfuura jennies uye nekudaro ane nzvimbo yakawanda yekukwana kubereka mudumbu, zvichikonzera mhuka hombe hinny. Zvinotendwa kuti mhuka zhinji dzinozvarwa zvakanyanya kupfuura hinnies.
64 makromosome