Flashcards
Biotechnology and Gene technology
Flashcards do conjunto (8)
- 1Define clonesGenes, cells or organisms that are genetically identical because they are derived from the same original DNA
- 2What is vegetative propagation?The production of structures in an organism that can grown into new individual organisms. The offspring are genetically identical to the parent and therefore are referred to as clones.
- 3What is the main example of natural vegetative propagation?Elm trees
- 4What are the advantages of Asexual reproduction?It is quick, allowing organisms to take advantage of resources in the environment.
I can be completed if sexual reproduction fails or is impossible. - 5What is the major disadvantage of asexual reproduction?There is no genetic variety , so any parental weaknesses will be in offspring. If the environment changes then all genetically identical organisms will be equally susceptible.
- 6What is the main advantage to the elm of vegetative propagationThe root suckers help the elm to spread. They grow in a circle known as a clonal patch. The clonal patch can expand as far as resources permit.
- 7What is the main disadvantage to the elm of vegetative propagation?The root suckers (clones) that form the clonal patch are genetically identical to the parent plant. When Dutch elm disease spread through Europe the elms were almost wiped out due to the root suckers being genetically identical and having no resistance to the disease. There is no genetic variation within the population, so natural selection cannot occur.
- 8What is the main method used in artificial propagation of plants?Tissue culture
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- GCE Biology FlashCards sobre Biotechnology and Gene technology, criado por sophie.holland96 em 19-02-2014.
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