GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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adaptation
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genetic engineering
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natural selection
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selective breeding
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Detailed explanation-1: -Farmers could keep information on their cows such as the milk yield of a bull’s mother and daughters in order to select ideal bulls as male parents. These bulls would then be allowed to mate with (unrelated) female cows with high milk yields in order to produce daughters with excellent milk yields.
Detailed explanation-2: -By selectively breeding animals, the gene pool is being limited and therefore a process of losing genetic diversity is initiated. The use of artificial insemination in the dairy industry has resulted in only a few sires having a large number of offspring.
Detailed explanation-3: -Breed specific characteristics, also known as breed traits, are inherited, and purebred animals pass such traits from generation to generation. Thus, all specimens of the same breed carry several genetic characteristics of the original foundation animal(s).
Detailed explanation-4: -They are known as the world’s highest-producing dairy animals. Holstein Friesian cows now dominate the global dairy industry. The Holstein-Friesian has the highest milk production of all breeds worldwide.