B3g New Genes For Old Questions

B3g New Genes For Old Questions paper

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  • Created by: Amira
  • Created on: 02-05-12 09:10
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B3g New Genes for Old
1. There is a fish that lives in arctic area that has natural resistance to frost. Some
scientists transferred the gene that makes the fish frost resistant to tomatoes.
What is transferring genes from one organism to another called?
Cloning / genetic engineering / genetic variation / mutation / phototropism
2. Scientists can further improve these frost resistant tomatoes by selective
breeding. Suggest two other features that they may want to improve:
T..........
D............... r..................
Speed of g.................
C............. or s.................
3. Selective breeding involves these steps:
Animals or plants with the d................ characteristics are chosen first
They are allowed to b................ in plants the p................ is transferred to
the female part of a f................ . (stigma)
From the o................ ................ the ones with the d................
characteristics are chosen again and allowed to r................ . (Higher: the
offspring are selected from different f................ to prevent an
accumulation of any h................ genes, such as a genetic disorder)
This process is r................ over and over again until a new breed with
d................ characteristics is obtained.
4. Owen also grows apples to sell.
His apples are large and taste sweet.
However, there are not many apples on each tree.
There are some wild apples growing near his farm.
The wild apples are small and taste sour.
Each wild apple tree produces lots of apples.
Owen thinks that if he breeds his apple trees with the wild apple trees he will only
get apple
trees that produce lots of large, sweet apples.
Will he only get apple trees that produce lots of large, sweet apples?
.....................................
Explain your answer.

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It is easy to clone plants but not animals. This is because animal cells usually lose
the ability to d................ , but many plant cells retain this ability.…read more

Comments

lisa linsdell

Cloze type questions to help with the revising of this unit. Download the answers from a separate document

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