http___livro-ensino-medio.f1cf.com.br_biologia_hr_biology-204.html_1.xml
1.1 2.1 3.1 4.1 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 13.1 14.1 15.1 15.2 15.3 15.4 16.1
Dolly the sheep was the first mammal cloned In 1996, cloning has been developed by scientists of the team at the Roslin Institute in Scotland, led by Ian Wilmut, and the official announcement was made in 1997 with the presentation of Dolly the sheep, the first clone of an adult mammal in the world. For the creation of Dolly, they used the cells of the mammary gland of an adult animal six years old, collected oocytes (cells that give rise to the egg) from an adult sheep, withdrew its core and replaced by the nucleus of mammary cell has all the genetic information of the original sheep. Using electrical pulses, the cell was reactivated and began dividing to form an embryo, which was implanted in the uterus of a female. Apparently the cloning process seems simple, but there were several attempts and many went wrong. Look commitment ... Until you get to the birth of Dolly, scientists fused 834 cores. At all stages of the process were huge losses. Of the 156 implanted cells, only 21 were developed. Only eight sheep were born. Of these, only one was a result of adult cell. Who do you think are the biological parents of a clone? Scientists have not reported the cloning of a mammal that has been successful overall. Is that good or bad? "Dolly the sheep was sacrificed six years of age, February 14, 2003, after a life marked by premature aging and various diseases. With five and a half years, the sheep began to suffer from arthritis. During his last days, Dolly was incurable degenerative disease of the lungs. much as arthritis lung problem are characteristic of older sheep, approximately 12 years. Source: www.estadao.com.br/ciencia/noticias/2003/fev/15/79.htm
1.1 2.1 3.1 4.1 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 13.1 14.1 15.1 15.2 15.3 16.1
Ovce Dolly je prvi klonirani sisavac Godine 1996, kloniranje je razvijen od strane znanstvenika iz tima na Roslin Institutu u Škotskoj, predvođeni Ian Wilmut, a službena najava je napravio u 1997 sa prezentacijom ovce Dolly, prvi klon od odraslih sisavaca u svijetu. Za stvaranje Dolly, oni koriste stanice mliječne žlijezde odrasle životinje šest godina, prikupljeni jajnih stanica (stanice koje bi mogle dovesti do jaja) iz odrasle ovce, povukla svoju jezgru, a zamijenjen u jezgri stanice dojke ima sve genetske informacije o izvornom ovaca. Korištenje električne impulse, stanica je reaktiviran i počeo dijeljenjem formirati embrio, koji je usađen u maternicu ženke. Navodno proces kloniranja izgleda jednostavno, ali bilo je nekoliko pokušaja, a mnogi je pošlo po zlu. Pogledajte opredjeljenje ... Dok ne dođete do rođenja Dolly, znanstvenici su spojene 834 jezgre. U svim fazama procesa bile ogromne gubitke. Od 156 implantirane stanice, samo 21 su razvijeni. Samo osam ovaca rođeni. Od tih, samo jedan je bio rezultat odrasle stanice. Što misliš, tko su mu biološki roditelji jednog klona? Znanstvenici nisu izvijestili kloniranje sisavaca koja je bila uspješna u ukupnom poretku. Je li to dobro ili loše? "Ovce Dolly je žrtvovao šest godina, 14. veljače 2003, i nakon života obilježenog prerano starenje i različite bolesti. S pet i pol godina, ovce počeo patiti od artritisa. Tijekom svojih posljednjih dana, Dolly je neizlječiva degenerativna bolest pluća. koliko artritis pluća problema su karakteristični za starije ovce, oko 12 godina. Izvor: www.estadao.com.br/ciencia/noticias/2003/fev/15/79.htm