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Milking a Transgenic Sheep

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Typically transgenic sheep expressing the extra growth hormone gene grow larger than normal sheep, are leaner, produce more milk and, in some breeds, produce more wool. A sheep has approximately 45,000 genes. CSIRO research indicates that taking just one of these genes (growth hormone) and inserting an extra copy into an animal's DNA is a complex business and can have effects previously unknown. For example, CSIRO research indicates that these transgenic sheep had a higher fecal worm egg count, indicating they may be more susceptible to internal parasites - something previously unsuspected. This image shows the transgenic (or GM sheep) modified with an extra copy of growth hormone gene on the left, with a normal-sized control sheep on the right.

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<table style="border:1px solid;padding:2px; width:310px;" ><tr><td><a href="https://www.scienceimage.csiro.au/image/1916/"><img src="https://www.scienceimage.csiro.au/images/embed/300_200_GA1695.jpg" width="300" alt="Milking a Transgenic Sheep" style="margin: 0 0 5px 0; border: 0px;"></a><br/><a href="https://www.scienceimage.csiro.au/image/1916/">Milking a Transgenic Sheep</a><br />by CSIRO</td></tr></table>
Milking a Transgenic Sheep
Milking a Transgenic Sheep
by CSIRO

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