MadSci Network: Genetics |
Hi Brad,
If cows would produce chocolate milk, how could we make some decent cheese?
I don't think people would like chocolate cheese (at least not in Europe ;).
Also calves may not like to drink chocolate milk from their mothers.
Back to your question. If one makes chololate milk, one takes normal milk to start
with. The 'white' stuff in the milk is among others proteins and fats. They
are required for the 'taste' of milk AND chocolate milk. So you should keep
the genes for these proteins.
On the cocoa side, there is not one gene involved in making the
chocolate experience. To make things more complicated, cocoa-beans are
treated for a long time to give the right taste.
In summary, making chocolate milk directly with cows is almost impossible.
And, in my opinion more important, it isn't ethical to do so. Chocolate milk
can be readily produced by mixing cocoa-powder, milk and sugar. There is no
need to genetically modify cows.
However, it is possible to produce certain drugs in cows. A dutch company
called Genepharming has made cows that produce a drug (to prevent sickness
in babies) in their milk. This drug can easily be collected (just milk the
cow) and the solution it is in (milk) is not dangerous (it's even healthy).
Regards,
Rolf 'Got Milk?' Marteijn
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