<p>Cloning remains an unpredictable process. A study by the Whitehead Institute for Biomedical Research shows that fewer than 10 percent of cloned embryos survive to birth. Those that make it are often born oversize and die earlier than normal. The animals listed here represent a sample of the roughly 15 cloned species. </p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile-desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-0"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>Sheep (“Dolly”)</strong></p><p><strong>7/1996</strong></p><div data-embedid="9b6b7608-0101-4c26-8de9-6aad26a6d2b9" id="insticator-embed-temp"></div><p><strong>Died of lung</strong></p><p><strong>disease at 6 1/2</strong></p><p><strong>Healthy</strong></p><p><strong>Bull</strong></p><p><strong>8/1999</strong></p><p><strong>Chinese Goat</strong></p><p><strong>6/2000</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-1"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>Died in one day</strong></p><p><strong>(abnormal lung development)</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-2"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>Gaur, or wild ox</strong></p><p><strong>1/2003</strong></p><p><strong>Died in two days</strong></p><p><strong>(from poor diet)</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-3"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>Banteng, or Asian wild ox</strong></p><p><strong>4/2003</strong></p><p><strong>Born twice</strong></p><p><strong>normal size; euthanized</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-4"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>Healthy</strong></p><p><strong>African wildcat</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-5"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>4/2003</strong></p><p><strong>Healthy</strong></p><p><strong>Mule</strong></p><p><strong>5/2003</strong></p><p><strong>Healthy</strong></p><p><strong>Horse</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-7"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-6"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>5/2003</strong></p><p><strong>Healthy</strong></p><p><strong>Deer</strong></p><p><strong>5/2003</strong></p><p><strong>Rats</strong></p><p><strong>9/2003</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-8"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><p><strong>One died soon</strong></p><p><strong>after birth; two are healthy</strong></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-9"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div>

May 2004

When Does Viable Life Begin?

A track record of the outcomes from cloning various species.

Health

Cloning Animals Remains Elusive 

Article

News

Zach Zorich

Science

Cloning remains an unpredictable process. A study by the Whitehead Institute for Biomedical Research shows that fewer than 10 percent of cloned embryos survive to birth. Those that make it are often born oversize and die earlier than normal. The animals listed here represent a sample of the roughly 15 cloned species. Sheep (“Dolly”) 7/1996 Died of lung disease at 6 1/2 Healthy Bull 8/1999 Chinese Goat 6/2000 Died in one day (abnormal lung development) Gaur, or wild ox 1/2003 Died in two days (from poor diet) Banteng, or Asian wild ox 4/2003 Born twice normal size; euthanized Healthy African wildcat 4/2003 Healthy Mule 5/2003 Healthy Horse 5/2003 Healthy Deer 5/2003 Rats 9/2003 One died soon after birth; two are healthy

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克隆动物仍然难以实现

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