Thursday, February 28, 2008

The gene


























1:
The gene
2:
What’s a gene?
A gene is a locatable region of genomic sequence, corresponding to a unit of inheritance, which is associated with regulatory regions, transcribed regions and/or other functional sequence regions.The physical development and phenotype of organisms can be thought of as a product of genes interacting with each other and with the environment A concise definition of gene taking into account complex patterns of regulation and transcription, genic conservation and non-coding RNA genes, has been proposed by Gerstein et al. "A gene is a union of genomic sequences
encoding a coherent set of potentially overlapping functional products".
3:
The cloning animals:
•Complex biotechnological procedures have enabled scientists to successfully clone mice, sheep, cows and other mammals.
•The technology is still at early stages and currently, one in three cloned animals is born abnormally large or with other developmental problems.
4:
GM food:
Genetically modified (GM) foods are foodstuffs produced from genetically modified organisms (GMO) that have had their DNA altered through genetic engineering. GM foods were first put on the market in the early 1990s. The most common modified foods are derived from plants: soybean, corn, canola and cotton seed oil and wheat.
5:
Dolly:
Dolly , a female sheep or ewe, was the first mammal to be cloned from an adult somatic cell, using the process of nuclear transfer. The cell used was a mammary gland , proving that a cell taken from a specific body part could create a whole individual. She was named Dolly after the curvaceous country western singer Dolly Parton. Previously it was believed that a specific cell could only produce replicas of the same body part from which it was obtained.
Laura.

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