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How will genome projects contribute to better productivity in cattle?
Scientists will be able to identify superior sets of DNA sequences in sperm ensuring better yields of milk and meat.
The above picture represents the different stages a cell goes through in its "lifetime." Specific genes within the DNA, called inhibitors, stop the cell cycle in G1 phase. This process helps to keep the DNA unaltered and the cells dividing at the correct rate. If cells continue through the cell cycle, uncontrolled, _________ may likely develop.
a tumor
Stem cell research is an emotional topic. Although the advancements in DNA technology are remarkable, there are many arguments for and against stem cell research. Which is an argument against stem cell research?
Stem cell research exploits fetuses and a mother's eggs.
Letter D is the part of the cell that makes proteins. What is letter D?
Ribosomes
Molecular biologists are using __________ to directly manipulate genes for practical purposes.
genetic engineering
Since the early 1990s, geneticists have produced ____________ crops that yield fruits and vegetables commonly found in U.S. supermarkets.
genetically modified
As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to new high-yield varieties. For example, in Peru, the Chachapoyas of the Inca Empire once grew 500 native varieties of potatoes. That number has been reduced to about twenty major potato varieties, worldwide. Why is it potentially dangerous to reduce the number of crop species in potatoes?
It makes the overall crop more susceptible to pests or disease.
For the body to function normally, the organs and tissues must communicate to control the development of the cells and tissues. If there is a break-down in this communication, uncontrolled cell growth in one part of the body could impede the development of other cells or tissues. This, in turn, can lead to the normal functions of the individual becoming seriously impaired. Research has shown that this uncontrolled cell growth and development can lead to which of these diseases?
Cancer
A mutation in a man's gametes would MOST LIKELY result in which outcome?
a mutation in his offspring
Recombinant DNA technology is used to produce all of the following EXCEPT
preferred genotypes for human offspring.
A segment of DNA shows bases in this order AGT CAC GCA, complete the corresponding DNA strand: TCA GTG?
CGT
All of the following biotechnological advances are possible EXCEPT one. That is the
reproductive cloning of humans.
Genetic engineering is the manipulation of genes using cloning and transformation to change the gene structure. Genetic engineering has many positive outcomes. These positive outcomes include
fruits and vegetables that do not spoil easily.
Events that damage the cell's regulatory apparatus can cause the uncontrolled division of cells called
Cancer
A simple change in DNA results in
mutation