Biology: cloned guar born healthy, then dies.The much-anticipated arrival of the first cloned guar, a rare oxlike species, ended sadly but raised hopes for a future success. The baby seemed healthy when it was delivered by cesarean section cesarean section (sĭzâr`ēən), delivery of an infant by surgical removal from the uterus through an abdominal incision. The operation is of ancient origin: indeed, the name derives from the legend that Julius Caesar was born in this from its surrogate mother surrogate mother, a woman who agrees, usually by contract and for a fee, to bear a child for a couple who are childless because the wife is infertile or physically incapable of carrying a developing fetus. , a cow, on Jan. 8, according to according to prep. 1. As stated or indicated by; on the authority of: according to historians. 2. In keeping with: according to instructions. 3. Advanced Cell Technology (ACT) in Worcester, Mass. Two days later, however, the calf died from a bacterial infection. The company proposes that cloning could become a valuable conservation aid. To test the idea, ACT selected the rare guar of southeast Asia Southeast Asia, region of Asia (1990 est. pop. 442,500,000), c.1,740,000 sq mi (4,506,600 sq km), bounded roughly by the Indian subcontinent on the west, China on the north, and the Pacific Ocean on the east. and India. Researchers removed nuclei from cow eggs and substituted nuclei of frozen skin cells from a male guar that died 8 years ago. Out of 40 embryos implanted in 32 cows came 8 pregnancies and 1 full-term infant. Despite the guar calf's death, the newborn proved that the basic approach works, says Philip Damiani of ACT. "We'd like to try the guar again," he adds. --S.M |
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