Dominant and recessive genes | Short Circuit
A simple, illustrated explanation of how dominant and recessive genes determine characteristics in animals.
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Norman Borlaug used selective breeding techniques to improve wheat production in Mexico. He produced plants which had large seed heads and hence a good yield. However, the plants were too tall and were prone to falling over (lodging).
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For thousands of years we have been selectively breeding farm animals to make them more and more productive. But in recent years there has been growing concern that pushing profitable traits has led to welfare problems.