GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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using enzymes to make washing powders
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using pectinase to make fruit juice
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producing plants that have been given genes for resistance to insect pests
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using yeast to make bread
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Detailed explanation-1: -Bacillus thuringiensis (Bt) crops are plants genetically engineered (modified) to contain the endospore (or crystal) toxins of the bacterium, Bt to be resistant to certain insect pests.
Detailed explanation-2: -For example, cornstarch can be made with GMO corn and sugar can be made with GMO sugar beets. Corn: Corn is the most commonly grown crop in the United States, and most of it is GMO. Most GMO corn is created to resist insect pests or tolerate herbicides.
Detailed explanation-3: -Genetic engineering of crops for insect resistance is the introduction of specific DNA sequences into crop plants to enhance their resistance to insect pests. The DNA sequences used usually encode proteins with insecticidal activity, so that in plants which contain introduced DNA, an insecticidal protein is present.
Detailed explanation-4: -Pest resistant plants such as Bt-cotton and Bt-brinjal have the cry gene from a bacterium called Bacillus thuringiensis, that produces crystal toxins. These toxins are harmless to humans but are fatal to a variety of pests.
Detailed explanation-5: -Pest resistant GM crops (primarily cotton and maize), have been genetically modified so they are toxic to certain insects. They are often called Bt crops because the introduced genes were originally identified in a bacterial species called Bacillus thuringiensis.