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Many crops such as tomatoes and corn are now routinely genetically manipulated to become more resistant to disease and herbicides What is one disadvantage of this genetic resistance?
Wiki User
∙ 11y ago
The genes may be transferred to weeds during pollination.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoThe genes may be transferred to weeds during pollination
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How are crops genetically modified?
They are genetically modified by controlling which ones reproduce. It is like a forced natural selection that is done by man in order to have desirable properties, like resistance to pesticides and herbicides.
Bt corn is a genetically modified crop that contains a gene from another species Which characteristic does this gene give the plant?
insect resistance
Why do scientists create genetically modified crops?
Genetically modified crops are made in order to make a desired trait, such as high yield, disease resistance, large fruit etc. more pronounced and/or undesired traits, such as toxins and large seeds...
Why genetically modified crops are made?
Genetically modified crops are made in order to make a desired trait, such as high yield, disease resistance, large fruit etc. more pronounced and/or undesired traits, such as toxins and large seeds in fruit etc. less pronounced. For example, some crops may have a resistance to a certain disease that other crops do not have, the gene that causes the resistance to the disease can be introduced to another type of crop in order to create resistance in the other type of crop. Also some crops may have undesirable traits such as naturally occurring toxins which are a defence mechanism of the plant. Genetic modification can be used to stop the expression of the genes which cause these toxins to be produced, making crops safer for consumption.
Why do some people prefer to eat foods that are not genetically engineered?
People have genetically modified foods to make them more insect-repellant, to give higher crop yields, to give products with more appealing qualities (flavour, texture, shelf life); this provides benefits for both producer and consumer. Some crop have been modified to be resistant to certain brands of herbicides, so that the plants are not affected when the farmer sprays the area for weeds (see the Monsanto website). Other modifications take the form of plants that are modified to be resistant to saline soils, or drought conditions. These benefits can increase the yields of crops in poorer or arid parts of the world which are normally susceptible to food shortages.
What characteristic is often genetically engineered in crop plants?
By far the characteristic that is most often genetically engineered into crop plants is resistance to herbicides, with engineering crops to produce a substance that kills insects into the plant itself a close second.
How are crops genetically modified?
They are genetically modified by controlling which ones reproduce. It is like a forced natural selection that is done by man in order to have desirable properties, like resistance to pesticides and herbicides.
How long does it take for a GMO plant to grow?
Genetically Modified foods, or GM foods, can be genetically modified with many different goals in mind. This can be for a faster maturation time or it could be for insect resistance, drought resistance, higher yeild, etc. Most GMO foods today are genetically manipulated to be resistant to herbicides or to produce an insecticide within the plant itself. Genetic engineering has no affect on their maturation.
The plasmid pARA-R has been genetically modified for what purpose?
ampicillin resistant
Why are foods genetically engineered?
Variety of reasons - drought resistance, pest resistance, increase crop yield to name a few.
When did crops become resistant to herbicides?
The big advantage for farmers in making crops resistant to herbicides is that certain herbicides could then be used to remove all weeds in one go meaning less spraying. Normally herbicides would damage the crops as much as the weeds so its of huge benefit if they are resistant.
What is the Disadvantage of using an ammeter and voltmeter to measure resistance?
There will be errors. The error comes from the measured resistance size of the decision.
What are the positives of genetically modified food?
-more food production - better nutrition - pesticide resistance
What is transgenic meat?
a genetically modified fish for better production, disease resistance and can be markatable without any health concern or ecologically healthy also.
What has the author Vijay K Nandula written?
Vijay K. Nandula has written: 'Glyphosate resistance in crops and weeds' -- subject(s): Plants, Glyphosate, Effect of herbicides on, Herbicide resistance, Herbicide-resistant crops
What is one of the problems with improving the food supply by genetically engineering better crops?
Some crops are genetically engineered to resist certain herbicides, which means the herbicides they are engineered to be resistant to can withstand having the herbicide sprayed directly on the crop. A known problem with these crops is that after a number of years, more herbicide is needed to control weeds. Because of this, more herbicides are sprayed on the crops and end up in foods. The safe limit for glyphosate (Round-up) in foods has been raised by the EPA in the United States and the use of Glyposate on crops has doubled in the years since Glyphosate resistant crops have been commercially grown. Other crops are genetically engineered to produce an insecticide in the plant itself. Though the insecticide is suppose to target certain insects, two concerns are that non-targeted insects are being killed and people's and animal's health may be affected when those crops are eaten. Generally, some believe horizontal transfer of the engineered genes in the crops may occur. Another problem that has occurred is weeds have developed resistance to the herbicides crops have been engineered to resist. The absence of long-term studies concerns others, making some feel that they are the long-term study.
Plants are expected to be genetically engineered to have?
resistance to the elements (such as cold and hail) and pests. Also they're engineered to have a larger crop
