Selective Breeding Essay

Selective Breeding Essay-31
This is added in order to select cells that have successfully taken up the gene construct.A promoter sequence: A tissue-specific promoter sequence is used to correctly switched the start of expression from the protein in cells with appropriate tissue, for example, mammary cells in lactating cows.The DNA product contains the organism’s entire DNA sequence, thus it is the desired trait plus the rest of the organism’s DNA.

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Polymerase Chain Reaction is a technique that allows scientists to copy and multiply a piece of DNA millions of times. C so that is separates into single strands and polymerase enzyme is added to synthesis new DNA strands from supplied nucleotides.

Step 5: Transformation into bovine cells The gene construct is incorporated into the genome of a cow cell using a technique called transformation.

Now, with the advances of science, we have some sophisticated ways to make easier get the most wanted kinds of livestock and plants.

Selective breeding and transgenesis are examples of popular (and successful) processes involving genetic manipulation in the current context.

The transgenic cows are an example of transgenic animals.

As a transgenic animal, the transgenic cows have the extra gene (transgene) present in every cell, but it’s only expressed in mammary tissue, making the transgenes protein only found and extracted from the cow’s milk.Restriction Enzymes come from bacteria and are used as a defence mechanism.When viruses (or other bacteria) attack, bacteria kill them by cutting up in both strands of DNA, at a specific sequence, usually about 4-8 base pairs long.Humans have been manipulating the transfer of genetic information between organisms for over 10. The first experiences were with cultivation of grains and domestication of animals.The facilities that these methods bring in order to keep having the necessary stuff for our survival make the humans improve their techniques.Step 2: Sourcing the transgene The desired gene sequence is extracted from the source organism’s DNA.The scientists obtain the sequence from a genomic library, that’s a collection of cloned segments of DNA containing at least one copy of every gene from a particular organism.This product is incubated in the water bath at 16 degrees for half an hour.Then, the scientists use the PCR (Polymerase Chain Reaction).These organisms are termed Genetically Modified Organisms (GMOs) and may be modified one of 3 ways: by alteration of existing gene, by deletion of existing gene or by addition of foreign genetic material.The last one enables the GMO to express the trait coded by the new gene. The aims of transgenesis can be for specific economic traits or for disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).


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