Presentation is loading. Please wait.

Presentation is loading. Please wait.

Animal Cloning 1.

Similar presentations


Presentation on theme: "Animal Cloning 1."— Presentation transcript:

1 Animal Cloning 1

2 White-faced lamb (clone) from Black-faced surrogate mother
Black-faced sheep + White-faced sheep = White-faced lamb (clone) from Black-faced surrogate mother 2

3 GM: GloFish The GloFish is a trademarked brand of genetically modified fluorescent zebrafish First genetically modified animal to become publicly available as a pet 3

4 GM: GloFish An ordinary zebrafish When? 1999
Where? National University of Singapore Who? Scientists from Singapore Why? Goal create a fish that could detect pollution by glowing in the presence of environmental toxins GloFish: first step in this process 3

5 GM: GloFish How? 1) Scientists extracted the green fluorescent protein gene from a jellyfish that naturally produced bright green bioluminescence 2) inserted the gene into the zebrafish genome After that they developed: a line of red fluorescent zebra fish  gene from a sea coral and yellow fluorescent zebra fish  variant of the jellyfish gene 3

6 Dolly the Sheep Birth: July 5, 1996 Death: February 14, 2003
was cloned at the Roslin Institute in Edinburgh first mammal to be cloned from an adult somatic cell by using nuclear transfer 4

7 Dolly the Sheep LIFE: lived for her entire life at the Roslin Institute gave birth to six lambs at the age of 5, Dolly developed arthritis → began to walk stiffly euthanized because of a progressive lung disease → Roslin scientist think there was no connection with Dolly being a clone sheep 4

8 Cloning of Endangered Species

9 Current Situation Rate of extinction is accelerating  habitat change
 pollution of environment  global warming  expansion of human society One in four animals on threatened list Massive decline in populations of animals  loss of biodiversity  reduction of the stability of ecosystems

10 Specific case: Amur leopard
Rarest cat in the world  habitat loss, poaching Inbreeding  deformity, infertility Habitat: Russian Far East High-priority animal 5

11 Idea of DNA library Preserve gene pool  living library for the future
Take tissue samples Put them into culture Freeze cells in liquid nitrogen DNA is alive and able to produce embryos Cell: complete copy of DNA Can reverse extinctions (if relative is available) 6

12 7

13 Pro Arguments A way to remedy the problem of endangered species
Only available tool we have Cloning allows to select the best and healthier donors 8

14 Contra Arguments Could hamper efforts to conserve biodiverse habitats
 maybe negative consequences for other animals Playing God Problem of extinction is not reduced Extinct animals establish a community that could reproduce Gives a false sense of security (no habitat preservation) 8

15 Cloning in Other Countries
South Africa's Law on Human Tissue 1983 bans the cloning of human cells; however, it has been amended, offering the possibility of sanctioning future research efforts. Australia "prohibits human cloning and other unacceptable practices associated with reproductive technology and for related purposes." In the Middle East only Israel has legislation governing genetic interventions. It strictly prohibits reproductive cloning and genetic intervention such as germ line gene therapy. 9

16 10

17 11

18 Works Cited http://www.calresco.org/ewp/full/cloning.jpg


Download ppt "Animal Cloning 1."

Similar presentations


Ads by Google